Friday, May 08, 2009

Flu Fatigue


One of the most subtle, yet most dangerous symptoms of the recent H1N1 flu outbreak is Flu Fatigue. Flu Fatigue is weariness brought on by media hype fed through a 24-hour news cycle that is constantly seeking its next crisis. Flu fatigue results in a built-up immunity to care about future epidemics and a general malaise regarding pandemic preparedness. Assuming that this most recent outbreak is over and should be forgotten is dangerous. History has shown that pandemic diseases are likely to quietly die-down, only to emerge more virulent than ever a few months later. This phenomenon is known as the ‘second wave’.

Second Wave
The three major pandemics over the past 100 years have shared a common epidemiology. The Spanish Flu (1918), Asian Flu (1957) and the Hong Kong Flu (1968) each began as mild illnesses in the springtime. Each of the three pandemics emerged in the autumn as much more virulent killers.1,2 Will the recent H1N1 shift into a more deadly strain this Fall? Pandemic experts such as the World Health Organization’s Director General Margaret Chan are preparing for the worst. “We hope the virus fizzles out, because if it doesn’t we are heading for a big outbreak. I’m not predicting the pandemic will blow up, but if I miss it and we don’t prepare, I fail. I’d rather over-prepare than not prepare.”3

Age of Pandemics
Epidemiologist and Chairman of the National Biosurveillance Advisory Subcommittee Lawrence Brilliant says we’re heading into an ‘Age of Pandemics’. “The 2009 swine flu will not be the last and may not be the worst pandemic that we will face in the coming years. Indeed, we might be entering an Age of Pandemics. In our lifetimes, or our children's lifetimes, we will face a broad array of dangerous emerging 21st-century diseases, man-made or natural, brand-new or old, newly resistant to our current vaccines and antiviral drugs. You can bet on it.”4

Betting on the outcome of a particular epidemic is risky. But amidst the uncertainty, experts agree that humanity will face a deadly pandemic in the future. Hospitals, and especially Emergency Departments, will be inundated by the sick and their families. The time to prepare is now, and several measures must be integrated to provide the maximum protection against transmission of pandemic disease.

Clearing the air
Increasingly, scientists are unraveling the secrets of viral disease transmission. New research has determined that air plays an important role in how we ‘catch’ respiratory diseases.5,6,7 Exhaustive studies following the SARS outbreak in 2003 indicate that this virus was airborne and that it is likely to have spread via a ventilation system within an apartment building.8,9

Recognizing the role air plays in disease transmission, architects, engineers, hospital administrators and building managers are looking to VIGILAIR® technology to reduce airborne pathogens. Installed within a building’s Heating Ventilation and Air Conditioning (HVAC) system, VIGILAIR® technology incorporates Ultraviolet Germicidal Irradiation (UVGI) and filtration to inactivate and remove pathogens within the HVAC air stream. UVGI damages the DNA/RNA of viruses, bacteria and fungi, preventing the microorganisms from reproducing and becoming infectious.

By disinfecting the air as it passes through the HVAC system, VIGILAIR® significantly reduces the amount of infectious microorganisms that are circulated throughout the building. Multiple hospital studies verify VIGILAIR® drastically reduces microbial contamination resulting in reduced infection rates.

VIGILAIR Systems, Inc. is the only UVGI manufacturer that has performed UVGI irradiation tests with live infectious agents including Anthrax, Avian flu (H5N1) and the SARS virus. The VIGILAIR® Biodefense system is the only UVGI technology to earn the Department of Homeland Security’s ‘designation’ as a Qualified Anti-terror Technology.

Fighting Flu Fatigue
Complacency can be costly--the time to make pandemic preparations is now. While no single measure can prevent disease transmission, VIGILAIR® is a technology that is proven to significantly reduce airborne pathogens. VIGILAIR® can play an important role in your comprehensive pandemic preparations. More information on pandemic preparations can be found at www.VIGILAIRsystems.com .

References

1. Pandemics and Pandemic Threats since 1900. PandemicFlu.gov. Retrieved May 6, 2009 from http://www.pandemicflu.gov/general/historicaloverview.html
2. .Hellerman, C. April 30, 2009. Scientists dig for lessons from past pandemics. CNNHeath.com. Retrieved May 6, 2009 from http://www.cnn.com/2009/HEALTH/04/30/swine.flu.1918.lessons/index.html
3. Jack, A.. May 3, 2009. Chan hits back at WHO critics. Financial Times. Retrieved May 6, 2009 from http://www.ft.com/cms/s/0/e6260d9a-37d4-11de-9211-00144feabdc0,dwp_uuid=819fc44c-33e2-11de-9eea-00144feabdc0.html?nclick_check=1
4. Brilliant, L. May 2, 2009. The Age of Pandemics. The Wall Street Journal. Retrieved May 6, 2009 from http://online.wsj.com/article/SB124121965740478983.html
5. Li Y, et al. Role of ventilation in airborne transmission of infectious agents in the built environment—a multidisciplinary systematic review. Indoor Air 2007; 17: 2-18.
6. Tellier, R. Review of aerosol transmission of influenza A virus. Emerging Infectious Diseases 2006; 12: 1657-1662.
7. Beggs, CB. The airborne transmission of infection in hospital buildings: fact or fiction? Indoor and Built Environment 2003; 12: 9-18.
8. Li, Y, et al. Multi-zone modeling of probable SARS virus transmission by airflow between flats in Block E, Amoy Gardens. Indoor Air 2004; 15: 96-111
9. Yu, I. Evidence of airborne transmission of the severe acute respiratory syndrome virus. New England Journal of Medicine 2004; 350, 1731–1739
Flu Chart- Taubenberger, J, Morens, D. 1918 Influenza: the Mother of All Pandemics. Emerging Infect Dis. Volume 12, Number 1, January 2006. Retrieved from http://www.cdc.gov/ncidod/eid/vol12no01/05-0979-G1.htm

Thursday, April 30, 2009

Swine Flu Facts for Architects and Engineers


UV-C destroys Swine Flu virus in the air stream
Swine Flu is caused by an influenza A virus subtype known as H1N1. Influenza A viruses are highly susceptible to the germicidal effects of ultraviolet light in the ‘C’ band. Technically speaking, UV-C does not kill the virus; UV-C inactivates the virus. Inactivated viruses have irreparable DNA damage caused by UV-C and are unable to reproduce and are therefore, rendered non-infectious.


Is Swine Flu airborne?
Existing research on influenza transmission is not definitive. However, there is a growing consensus amongst scientists that influenza viruses are transmitted through the air. All research agrees that influenza viruses are airborne as they are expelled by infected people via coughs, sneezes and normal respiration. Some of these infectious droplets settle on surfaces, some of the droplet nuclei travel through the air.
Swine Flu is transmitted when a person inhales the infectious nuclei or touches the droplets and then transfers the virus to the body through the nose, mouth or eye. So the real issue isn’t if influenza is airborne, the debate focuses on how the virus enters the body either by inhaling flu aerosols or by contact and transfer to the body. Most researchers say airborne and contact transmission both play a role, but are not certain of each mode’s relative contribution to human infection.

The VIGILAIR® Solution

When it comes to pandemic planning, there is no panacea. The best strategies involve a comprehensive approach to reducing pathogens in the built environment and preventing transmission of disease. VIGILAIR® is a proven technology that is currently used for pathogen control and bio-defense in hospitals, research labs and other high profile government buildings.
VIGILAIR® captures and destroys pathogens such as A(H1N1) as the microorganisms circulate through the HVAC system. Each VIGILAIR® system is designed to yield a predictable kill rate on specific pathogens. Engineering and design are crucial for VIGILAIR® Pathogen Control and Biodefense systems. Airborne inactivation of viruses such as A(H1N1) requires a specific energy intensity and exposure time (also known as the ‘dose’). Without proper scientific design, UV systems will not deliver a strong enough dose to have any effect on the A(H1N1) virus. VIGILAIR Systems, Inc. is the only UVGI manufacturer that has performed UVGI irradiation tests with live infectious agents including Anthrax, Avian flu (H5N1) and the SARS virus. The VIGILAIR® Biodefense system is the only UVGI technology to earn the Department of Homeland Security’s ‘designation’ as a Qualified Anti-terror Technology.

For Architects and Engineers

In light of the recent Swine Flu outbreak, you may be asked if there are any engineering controls to help prevent or lessen exposure to A(H1N1). While no one individual tactic can eliminate virus transmission, there are steps to lessen exposure to the virus. VIGILAIR® is a proven technology that reduces the concentration of infectious microorganisms within buildings. VIGILAIR® is an evidence based design tool that you can recommend to your clients as they seek innovation solutions to the challenges caused by A(H1N1).

Tuesday, April 28, 2009

Swine Flu: time for planning, not panic

First, an update on the current state of swine flu infection across the world. Here's a Google map listing all known and suspected swine flu cases worldwide:

View H1N1 Swine Flu in a larger map
Now, what to do about it!
Many of our clients are calling, asking about the protection VIGILAIR offers against the current swine flu virus. The good news is that influenza A (H1N1) virus is highly susceptible to UV. Both our Pathogen Control Systems (PCS) and Biodefense Systems (BDS) are designed to provide the proper dose of UV energy to inactivate the swine flu virus in the air stream.
Now the not-so-good news. No single technology or drug will provide 100% protection against contracting swine flu. VIGILAIR is an excellent component in a comprehensive strategy to reduce infection risk.
For a realistic statement of what VIGILAIR offers in protection against swine flu, click here.

Wednesday, April 01, 2009

UK Terrorism Experts say Dirty Bomb Threat Increasing

Britain's Home Secretary couldn't be more direct. She said that the threat of of terrorists using a dirty bomb is, "...severe..."

Secretary Jacqui Smith made this assessment as her government launches a new
and aggressive effort to combat terrorism that includes a much greater role for citizens. The new effort is described as "extremely broad ranging" and includes training 60,000 citizens in terrorism prevention and response.

Apparently new intelligence has raised concerns over the use of a chemical, biological or nuclear dirty bomb that could contaminate a wide area, endangering thousands, if not millions of people. British Government reports say that the dirty bomb threat is elevated because it has become easier for terrorists to obtain necessary materials from rogue and failed states, as well as from hospitals.

Ms. Smith warns, "Changing technology and the theft and smuggling of chemical, biological, radiological, nuclear and explosive materials make this aspiration more realistic than it may have been in the recent past."

Britain's counter-terrorism forces have grown from 1,700 officers in 2003, to 3,000 in 2009.

Monday, February 02, 2009

UV offers green alternative for cleaning genome lab

Although VIGILAIR is known for disinfecting air circulated through hospitals, our UV technology has several other applications. VIGILAIR Systems has partnered with the Memorial Sloan Kettering Cancer Center to create a UV sterilization system used in a genome lab.
Find the media release here.
Labs that research human DNA require extremely clean environments. Tiny molecular contamination can ruin weeks of hard work by lab techs. Traditionally, workers had to use caustic chemicals and cleaning materials to 'scrub down' the lab. This process has several disadvantages:
  • Maintenance staff needed specialized training to complete the task
  • Results were mixed
  • Chemicals and cleaning materials used in the process are 'hazardous waste' and must be disposed of properly
  • Costs associated with manual cleaning are high
After conferring with Sloan Kettering, we went on-site to measure the lab room and to begin our calculations on how to safely and effectively irradiate all the surfaces in the room. We designed an in-room system consisting of UV emitter lamps that were strategically placed in the lab's ceiling. The system produces a predetermined dose of UV capable of inactivating target organisms by a minimum of 99.999%.

The system's controls initiate the lights when the room is unoccupied and shuts-off the lights should anyone enter the room. This prevents any exposure to UV radiation.

We are proud of our partnership with Sloan Kettering, an institution recognized as a world leader in research and patient care.

Thursday, September 11, 2008

EPA BASE study suggests HVAC plays a role in Sick Building Syndrome

A newly released analysis of the US EPA BASE study shows that improperly maintained HVAC systems may cause symptoms associated with Sick Building Syndrome (SBS). The study's authors (representing Lawrence Berkeley, Harvard University, Helsinki University and the US EPA) assessed data collected from 97 representative US office buildings that use air conditioning.
The findings that interested us most dealt with SBS symptoms that may be attributed to moisture with the HVAC systems. From the study's abstract (text emphasis added by me):
"Humidification systems with poor condition/maintenance were associated with significantly increased upper respiratory symptoms, eye symptoms, fatigue/difficulty concentrating, and skin symptoms, with OR = 1.5, 1.5, 1.7, and 1.6. Less frequent cleaning of cooling coils and drain pans was associated with significantly increased eye symptoms and headache, with OR = 1.7 and 1.6. Symptoms may be due to microbial exposures from poorly maintained ventilation systems and to greater levels of vehicular pollutants at air intakes nearer the ground level. Replication and explanation of these findings is needed."
Also from the study's Discussion section:
"These findings support current beliefs that moisture-related HVAC components such as cooling coils and humidification systems, when poorly maintained, may be sources of contaminants that cause adverse health effects in occupants, even if we cannot yet identify or measure the causal exposures."
Limitations
The authors caution that these findings need replication before suggestions or guidelines are advocated. While researchers were able to quantify the risks associated with poorly maintained humidification systems, they were unable to "...identify important (symptom) benefits from well-maintained humidification systems."

The study's findings are important because they demonstrate and elevate the need for Ultraviolet Germicidal Irradiation (UVGI) in all air conditioned buildings. Our experience has shown that if you have dirty or inefficient cooling coils, your HVAC is likely a reservoir for microorganisms. These microorganisms can cause symptoms associated with SBS, in hospitals these pathogens can promote Hospital Acquired Infections (HAI).

This study is a small but important piece in the puzzle that surrounds Indoor Air Quality. Its importance lies in the fact that yet another credible group of scientists have found evidence that HVAC systems can be linked to airborne pathogens that cause health problems.

Thursday, August 28, 2008

Learn Something New Everyday

I learned something new today about the Center for Medicare and Medicaid Services' (CMMS) plan to change reimbursement for some Hospital Acquired Infections (HAI). The new item appears in the Consumers Reports Blog:

"Medicare has listed eight preventable conditions (above) for which it will not reimburse hospitals after Oct. 1, 2008, and is proposing nine more conditions to be added in 2009. The effects could widen as private insurers and state-funded health insurance programs begin to follow Medicare's lead.

Some of the eight have been dubbed "never events" because they should never happen. They include leaving sponges or implements in a patient after surgery and giving the wrong type of blood. Several hospital-acquired infections are also on the list. In 2007, almost 500,000 hospitalized Medicare patients were hurt by the eight preventable events.

While the new rule bars hospitals from passing the bill on to the patient, it addresses only charges accrued in the initial hospital stay. But patients might need continuing treatment that adds up to a bundle. Consumers Union has asked Medicare to clarify that patients who are harmed by these preventable conditions will not be billed for any of the additional care they need."

I didn't realize that the continuing costs of treatment following a hospital acquired condition were not addressed by the legislation. So...stay tuned. When Consumers Reports dot Org receives an update, I will pass it on.

Wednesday, August 27, 2008

Physicians respond to changes in HAI reimbursement

Former NY Lt. Governor Betsy McCaughey wages her crusade against HAI in the media. You will frequently find her opinions on television, in newspapers and on-line. A recent example is this Wall Street Journal opinion piece from August 14:

"We have the knowledge to prevent infections. What has been lacking is the will. A recent survey from the patient-safety organization Leapfrog found that 87% of hospitals fail to consistently practice infection prevention measures. Insurance companies that sell liability coverage to hospitals could change that by offering lower premiums to hospitals that rigorously follow infection-prevention protocols.

To be sure, lawsuits are not the best way to improve patient care. Many verdicts are unjustified, and few truly injured patients find a lawyer to take their case. Still, the coming wave of lawsuits, as well as financial incentives from Medicare and insurers, will fight complacency about hospital hygiene."
Physicians are responding to the article, maintaining that HAI rates must be reduced--while maintaining that not all HAI can be prevented:

"Regarding Betsy McCaughey's "Hospital Infections: Preventable and Unacceptable" (op-ed, Aug. 14): Strengthened measures to stimulate hospitals to prevent methicillin-resistant Staphylococcus aureus (MRSA) acquired in-house are certainly well-intentioned. The germs outsmarted everyone. What nobody predicted was the continuous evolution of new threats to patients and hospital personnel. I well recall our fervor, and idealism, in reporting prophylactic and control tactics to deal with sequential explosions of Legionnaires' disease, AIDS, intestinal infections as a side effect of antibiotic usage, drug-resistant tuberculosis, hepatitis B (followed by C), etc.

It is noble posturing for Medicare to proclaim it won't pay hospitals for treating infections acquired on the premises, but how does that policy stand up when the bacterium was heretofore unknown or not foreseen as a danger to patients or staff?

Leslie Norins, M.D., Ph.D.
Naples, Fla.

If such a standard is imposed, rational surgeons will try very hard to avoid patients most at risk. Such flight to the good-risk patient already occurs in states with aggressive cardiac surgical-reporting requirements. In addition, surgeons and hospital administrators will work even harder to game the system in their reporting, and will become even more incautious in their use of prophylactic antibiotics, further promoting the emergence of resistant strains of bacteria.

Aggressive harassment from insurance companies, government agencies, hospital administrators and ignorant non-medical persons is doubtless a major factor in the early burnout and decline of cardiac surgery as a "hot" specialty; residency slots, coveted a generation ago, now go begging, and fewer than half which are taken are filled by American graduates.

Ronald M. Becker, M.D.
Sacramento, Calif.

A deep and serious breast bone infection following open-heart operations currently occurs in approximately 1% of patients. Patients who are obese and diabetic are at a substantially higher risk for such an infection. The proportion of individuals in the U.S. who are obese or diabetic (or commonly both) is increasing in epidemic proportions, as is the number of such patients who require open-heart surgery or other invasive procedures to treat their heart conditions. Many patients who enter hospitals for treatment are already colonized by MRSA, further increasing their risk of infection. The combined threat of no reimbursement and a lawsuit will result in a refusal by physicians and hospitals to perform invasive procedures in many of these high-risk patients. This scenario will also play out for patients who require major orthopedic procedures, such as joint replacement. It is totally unrealistic to assume that these complex procedures can be performed with zero risk of infection.

Nicholas Kouchoukos, M.D.
Michael C. Murphy, M.D.
St. Louis, Mo.
Dr. Kouchoukos is a past president of the Society of Thoracic Surgeons.

We live in a sea of bacteria. We have 10 times more bacteria in our gastrointestinal tract then we have cells in our bodies. We cannot eliminate all of these bacteria from our body before surgery. We can be clean, but not sterile. Many years ago, a study demonstrated that at least 50% of "hospital-acquired" infections arose from bacteria that patients carried into the hospital with them."

Gary L. Simon, M.D., Ph.D.
Director, Division of Infectious Diseases
George Washington
University Medical Center
Washington

It is likely that the Medicare guidelines will be adjusted after they are used for awhile. I can see both sides of the story here. Perhaps the truth is that both sides are right and HAI will be significantly reduced, lives will be saved, costs will be cut.

Monday, June 30, 2008

MRSA deep clean a waste? Not really.

The headline blared, PATIENTS STILL AT RISK FROM MRSA DESPITE 57 MILLION POUND DEEP CLEAN'. The entire premise, I thought, was so bizarre. The idea that a one-time cleaning of something would prevent the return of contamination. If this was true, my 5 year old son would be overjoyed. He could take a bath in June and be set for the entire summer.
MRSA infection is a complex problem that is not to be eradicated with a one shot effort. Simple solutions, those sometimes promoted by press and politicians, are part of the answer, but not the entire answer. Maybe that's because staph bugs don't read the newspaper or listen to political speeches. Otherwise they would know to completely leave the hospital and never return following the 'deep clean'.
The headline in question appeared in the UK's Independent, written by Brian Brady and Jane Merrick:
Thousands of patients will remain at risk from superbugs, despite a £57m "deep clean" of hundreds of hospitals, because a vital screening programme will not be put in place for at least a year.
One of the world's leading experts on hospital-acquired infections (HAIs) warned yesterday that every one of the hospitals cleaned under Gordon Brown's flagship health policy will be back to square one as soon as the cleaners finish, because no one is stopping bacteria such as MRSA and Clostridium difficile from coming into the buildings.
Professor Hugh Pennington of Aberdeen University said the deep-clean programme would be "an expensive waste of resources".
The thought that a one time deep cleaning would end Hospital acquired Infections is naive at best, dangerous at worst. Professor Pennington' s assertion that MRSA infections are not "...environmental..." depends on what your definition of environmental is.
"Professor Pennington said: "Politicians get hung up on cleaning, but the major issue isn't environmental; it is people bringing the bugs into hospitals. Once the bacteria hit the floor they die off. The natural home of MRSA is either in infected patients or up the noses of the rest of us, so that is what they should be attacking."
At VIGILAIR we stress that all infections are environmental. A good example of MRSA as an environmental pathogen
is found in an article published in the journal of the Hospital infection Society-- 'Ventilation grilles as a potential source of methicillin-resistant Staphylococcus aureus causing an outbreak in an orthopaedic ward at a district general hospital', (1998) 39: I 27-I 33).
This article showed how MRSA was being distributed in a hospital via the ventilation system. While it is true that most MRSA is introduced into the hospital by visitors, patients and staff, environmental controls are key in removing these pathogens from the environment. Pennington's statement that MRSA bacteria die when they hit the floor is contradicted by a large body of research. The November 2006 issue of Infection Control and Hospital Epidemiology contains a report on MRSA survival that is typical of this research:
"We examined the duration of survival of 2 strains of methicillin-resistant Staphylococcus aureus (MRSA) on 3 types of hospital fomites. MRSA survived for 11 days on a plastic patient chart, more than 12 days on a laminated tabletop, and 9 days on a cloth curtain."
Ignoring the care environment in the fight against MRSA is short sighted. The strategy that we recommend acknowledges that the environment plays a significant role in hospital acquired infection and that several tactics must be employed together to be successful.
We've been able to culture Staph from the cooling coils of hospital HVAC units. Psuedomonas, Staph and many other bacteria are taken from patient care areas, and then find an excellent breeding ground in the dark, cool and food rich home in hospital ventilation systems.
VIGILAIR technology removes the HVAC as a reservoir for pathogens by disinfecting the HVAC system. VIGILAIR UVGI deactivates bacteria, fungi and viruses on surfaces as well as in the air. Importantly, this protection is constant.
Unlike one time cleanings the germicidal irradiation of cooling coils continues 24 hours a day, VIGILAIR technology is no silver bullet, either. It must be used in tandem with hand washing and 'deep cleaning'. The combination of these efforts is the best way to remove these pathogens. Any one of these tactics used in isolation will provide only a temporary relief, because hospital acquired infections are environmental by nature.

Thursday, June 05, 2008

MRSA Action UK-They Get it!

Over on our other site we highlighted a new report on anti-bacterial wipes yesterday. This morning we see that MRSA Action UK agrees with our sentiments:

MRSA Action UK: Antibacterial wipes are not the panacea for healthcare infections

Wednesday, 04 Jun 2008 08:46
MRSA Action UK’s contention has always been that to eliminate bacteria from the healthcare environment a systematic, comprehensive policy of eradication must be employed. In today’s medical arena the battle against infections is not just against MRSA and Clostridium difficile, but also against the others waiting in the wings. As a Charity that has been campaigning for safer hospitals in this country all the initiatives that have been introduced to reduce infections in our hospitals will fail, if this systematic and comprehensive approach is not taken.

Hospital cleanliness is paramount for the safety of patients in the NHS, and using antibacterial wipes as a policy to keep our hospitals clean is doomed to failure.

Antibacterial wipes can be effective against pathogens such as MRSA but only if used in the right way. They should only be used once for one surface, however there is no substitute for proper cleaning and decontamination performed by staff that are properly educated and trained in this process, using the appropriate equipment and techniques. The cleaning process should be comprehensive, and we believe monitored on its efficacy, and compliant in all ways. To be successful in this decontamination process it must be supported by regular environmental testing.

Controlling the infections in our hospitals cannot be solved by any single method, there are many ways for these pathogens to be transmitted on hands, uniforms, contaminated equipment and by the airborne route. The abject failure of this government to introduce a comprehensive system of infection prevention and control has ensured that as a nation we will stay bottom of the league with the numbers of healthcare infections in our hospitals, and until they tackle this problem head-on we will not have the safe, clean care of our neighbours in Northern Europe, where eradication of the bacteria remains a top priority.

As a Charity we have always maintained that whilst antibacterial wipes may help to prevent a patient contracting a healthcare infection, they are no guarantee, only thorough regular decontamination, and strict adherence to comprehensive infection prevention and control policies will do this.


Derek Butler
Chair
MRSA Action UK
Registered Charity No. 1115672
Telephone: 07762 741114
http://mrsaactionuk.net

Eureka! They really get it.

Wednesday, May 07, 2008

Pilot study reinforces use of portable anteroom HEPA filtration

A new study from a leader in airborne disease research indicates that Operating Room HEPA filtration is not a guarantee against nosocomial infection. Dr. Russel Olmstead led a team that looked at airborne contamination inside of the OR environment.

Pilot study reinforces use of portable anteroom HEPA filtration

To prevent perioperative transmission of airborne microorganisms

Washington, DC, May 6, 2008 – Amidst an increase in new tuberculosis cases, researchers have begun investigating the effectiveness of new operating room filtration systems designed to protect staff and patients. According to pilot study findings published in the May issue of the American Journal of Infection Control, a supplemental portable anteroom high-efficiency particulate air (PAS- HEPA) filter unit placed outside operating room suites may prevent secondary transmission of airborne microorganisms like Mycobacterium tuberculosis (M. tuberculosis).

“The rate of decline in newly reported tuberculosis cases in the U.S. has slowed,” said lead study investigator Russell N. Olmsted, MPH, CIC, epidemiologist from Saint Joseph Mercy Hospital in Ann Arbor, MI. “This, coupled with the worldwide emergence of even more drug-resistant tuberculosis, reinforces the need for renewed vigilance and surveillance from healthcare professionals. In particular, study results reinforce the need for measures to optimize air particle removal.”

Olmsted and colleagues compared the efficiency of freestanding HEPA filtration units to a new portable anteroom system (PAS)-HEPA combination unit in removing harmful airborne infectious pathogens. Freestanding HEPA units were evaluated in the operating room, while the PAS-HEPA unit was placed outside over the main operating room door. Both smoke plume and non-infectious particles similar in size to M. tuberculosis were used to mimic movement of airborne pathogens within highly pressured environments.

“We observed interruption of normal patterns of airflow with freestanding HEPA units placed inside the operating room,” said Olmsted, adding that instead of being captured by the air-filtration system, smoke plume traveled upward from the operating room table and into the breathing zone of personnel who might be present during a typical surgical procedure.

“This suggests an increased potential for occupational exposure to airborne microorganisms as well as an unwanted introduction of contaminants into the patient’s open surgical site,” he explained.

In contrast, deployment of the PAS-HEPA combination unit pulled the smoke downward, away from the operating room table and toward the floor and main door. The second phase of the study (which involved simulated microscopic particles) mirrored these observations; within 20 minutes, over 94% of submicron particles were cleared from the operating room.

“The results of Mr. Olmsted’s study reinforce the Centers for Disease Control and Prevention (CDC) 2003 guidelines for environmental infection control as well as 2005 guidelines for preventing the transmission of M. tuberculosis in healthcare settings,” said Janet E. Frain, RN, CIC, CPHQ, CPHRM, APIC 2008 President and Director, Integrated Services, Sutter Medical Center in Sacramento, CA. “These findings should be considered for integration into an overall infection prevention and control program to help ensure both patient and healthcare personnel safety.”


These findings substantiate results we've discovered in our testing of Operating Rooms. Recently we found microbial contamination (including fungi) immediately downstream from HEPA filtration units installed in ORs. The contamination was found one week after the filters were certified for efficiency compliance.
Filters are great for trapping microorganisms, but they do not 'kill'. Eventually filters can become colonized and act as a breeding ground for pathogens. Thinking that you have 100% protection because you have HEPA filtration is a false sense of security.
We suggest a balance between UV and filtration to provide a better strategy for reducing environmental pathogens in critical care areas of your hospital. E-mail us to find out more about a recent study in which VIGILAIR provided better protection than laminar flow for operating suites in a large urban hospital.

A Common Killer

Here's a quick question for our readers:
What is the #1 world wide killer for children five and under?
  1. smallpox
  2. measles
  3. AIDS
  4. malaria
  5. pneumonia
If you chose #5, pneumonia, you're correct. Many of those other disease have a higher profile and get more attention. But a recent report released by the World Health Organization says that Pneumonia kills more than 2 million kids under the age of five each year. It is the #1 killer for that age group, responsible for nearly 1 in 5 deaths for little ones.
I mention it so that we raise awareness on emerging and somewhat exotic disease, we should not forget those common killers who destroy so many young lives, albeit with a low profile.

Hospitals struck by new killer bug | Metro.co.uk

UK Newspaper continue to examine (and exploit) news on infectious disease. The latest cause for concern is Stenotrophomonas, nick-named 'Steno' for popular consumption.

Hospitals struck by new killer bug | Metro.co.uk

Tuesday, May 6, 2008

A new hospital superbug resistant to all antibiotics could be killing hundreds of patients, experts have warned.

The infection, known as 'Steno', is on the increase and could be harder to tackle than MRSA and C.difficile.

The bug spreads almost exclusively in hospitals through wet areas such as taps and shower heads, and is thought to kill a third of the people it infects after entering the bloodstream.

Chemotherapy patients, including children, are among those most in danger, because the infection spreads through ventilation tubes and catheters.

There are about 1,000 reports of Steno blood poisoning in Britain each year, according to today's study by the Wellcome Trust Sanger Institute, near Cambridge.

Research leader Dr Matthew Avison said: 'This is the latest in an ever-increasing list of antibiotic-resistant hospital superbugs.

'The degree of resistance it shows is very worrying. Strains are now emerging that are resistant to all available antibiotics.'

MRSA is thought to have caused 1,652 deaths in 2006, up from 51 in 1993. Clostridium difficile was mentioned on 6,480 death certificates in 2006, a 72 per cent rise on 2005.

Steno sticks to catheters or medical tubes and grows into a so-called 'biofilm'. When the catheter is next flushed, the bug enters the patient's bloodstream and can cause septicaemia, especially if their immune system has already been weakened.

The onus is on both patients and healthcare professionals to do more to keep equipment clean, Dr Avison told the Genome Biology journal.


Stenotrophomonas is another pathogen that we've isolated from the hospital environment. In our study, we were able to culture Stenotrophomonas from surfaces in the Heating Ventilation and Air Conditioning (HVAC), surfaces in NICU as well as in the tracheal aspirates of the patients. As mentioned in the article, this bug likes water--and that is where we found it, in the water of the HVAC drain pan.

As we look to decrease Hospital Acquired Infections (HAI), we should consider all the reservoirs for pathogens. Neutralizing the source of an infectious agent is the key to long term success in infection prevention. Is the Stenotrophomonas in the HVAC water making its way into the care areas? It's hard to say and expensive to prove.

So, we focus a lot of attention on 'end of the pipe' solutions such as hand washing. This is a good thing. But at the same time we should eradicate the factories where pathogens are generated and distributed within a health care facility. Our research has shown that one such factory is the HVAC system. We've also shown that VIGILAIR® can eliminate this reservoir as a potential source.

Tuesday, April 22, 2008

Ionic air purifiers' dirty little secret: They don't get rid of dust - Los Angeles Times

Do home air purifiers work?

During a Q and A session following a presentation at an OSHA conference in Harrisburg, PA, a familiar question was asked, "Can VIGILAIR be installed in a home?" While we do not serve the consumer market, there are alternatives such as in-room air purifiers. However, in order to find one that works, you need to find the science and get beyond the marketing of these devices. I found this LA Times article accurate and informative:

"Ionic air purifiers' dirty little secret: They don't get rid of dust

By Chris Woolston, Special to The Times
April 21, 2008

The product: Dust, cigarette smoke, pollen and pet dander: With so many irritants floating around our homes and work places, clean air is a hot commodity. Americans spend hundreds of millions of dollars on furnace filters and air cleaners each year. Though some consumers are simply trying to bring a little extra freshness into their lives, many others hope that their investment will help relieve their asthma or allergies.

If you've ever shopped for an air cleaner -- or if you've ever idly flipped through a SkyMall catalog -- you've undoubtedly seen ads for ionic air purifiers, devices that take an unusual approach to clearing the air. Instead of relying on fans to move air through filters, the machines release a steady stream of negatively charged ions that electrify the bits of dust, dander or other flotsam. The airborne particles pick up the negative charge and become strongly attracted to positively charged collection plates inside the machine. (In many cases, they also become attracted to other charged surfaces such as walls, table tops and TV screens.)

Except for a few models that use fans to help suck in the charged particles, most ionic air purifiers work silently. And, as ads are quick to point out, the devices generally don't have any motors or moving parts, and there are no filters to replace.

There's another thing that separates ionic air purifiers from other technologies: To varying degrees, all ionic air purifiers release ozone, a potential pollutant. A 2006 study by researchers at UC Davis found that one popular brand, the Ionic Breeze Quadra, released about 2.2 milligrams of ozone per hour, or about as much as a constantly running photocopier. (Ionic purifiers shouldn't be confused with ozone generators that are marketed as "air cleaners." By design, these devices can release 50 to 200 milligrams of ozone per hour.)

The claims: According to the Sharper Image web site, the Ionic Breeze is "proven effective at reducing airborne allergens and irritants -- with no fan, no motor and no noise." The Heaven Fresh web site says that its purifiers can provide relief from "asthma, bronchitis, hay fever and other respiratory diseases." Heaven Fresh also claims that the ozone emitted by its machines helps clean the air. According to the site, "ozone is one of the purest and most powerful oxidants and germicides known."

The bottom line: Ionic air purifiers have undeniable appeal, but there's a problem: They don't really improve air quality, says Dr. James Sublett, a clinical professor at the University of Louisville; a fellow at the American College of Allergy, Asthma & Immunology; and co-chair of the 2007 ACAAI Healthy Indoor Environment conference. "We [allergists and immunologists] generally don't recommend them," he says. "This is a windmill that I've been tilting at for a number of years."

According to Sublett, the devices don't effectively remove dust, dander and other irritants from a room. Without fans, he explains, they can't collect airborne particles from more than a few feet away. And when even small amounts of dust enter the device, the plates inside quickly lose much of their power to attract more particles. Meanwhile, the charged particles that stick to walls or TV screens haven't left the room and can always billow up again to cause trouble.

The ozone released from the devices is another deal-breaking shortcoming, Sublett says. "Ozone is a pollutant and an irritant. Even small amounts are too much." People who use several units at a time are especially likely to get an ozone overload, he says. One of Sublett's patients noticed a great improvement in her breathing when she turned off the six ionic purifiers in her home."

Air purification for homes should involve both capture and 'kill'. Filters capture and remove irritants, while technologies such as Ultraviolet light destroy pathogens. FIlters take care of the big airborne contaminants, UV deactivates the microorganisms that elude the filters. The balanced approach is best.

Friday, April 04, 2008

WHO | Avian influenza – situation in Pakistan - update 2

The two best kept secrets in Pakistan

The first secret is, 'Where is Osama bin Laden?'. Secret number two is that there was confirmed Human-to-Human (H2H) spread of Avain flu in Pakistan more than 5 months ago. Here's the complete info release from the WHO:

WHO | Avian influenza – situation in Pakistan - update 2

3 April 2008

Two additional H5N1 cases were confirmed by serological testing, thus providing final H5N1 infection test results on a previously reported family cluster in Peshawar.

These tests were conducted by the WHO H5 Reference Laboratory in Cairo, Egypt and the WHO Collaborating Centre for Reference and Research on Influenza in Atlanta, USA. The table below summarises the testing results of the confirmed/probable cases in the family cluster.

  • The preliminary risk assessment found no evidence of sustained or community human to human transmission.
  • All identified close contacts including the other members of the affected family and involved health care workers remain asymptomatic and have been removed from close medical observation.

These laboratory test results support the epidemiological findings from the outbreak investigation in December 2007, and the final risk assessment that suggested limited human to human transmission likely occurred among some of the family members which is consistent with some human-to-human transmission events reported previously. This outbreak did not extend into the community, and appropriate steps were taken to reduce future risks of human infections.

Relationship Onset Date Outcome Exposure Status
Case 1 (Index case) 29 Oct 07 Fully recovered Direct contact sick/dead poultry Confirmed (serology)
Case 2 12 Nov 07 Dead (19 Nov 07) Close contact with Case 1, no known direct contact with sick/dead poultry Probable
(No sample available)
Case 3 21 Nov 07 Dead (28 Nov 07) Close contact with Case 1 and 2, no known direct contact with sick/dead poultry Confirmed (PCR)
Case 4 21 Nov 07 Fully recovered Close contact with Case 1 and 2, no known direct contact with sick/dead poultry Confirmed (serology)

It is great news that the H2H transmission burned out before it hit the wider community. But many aspects of this news are troubling. First and foremost is the credibility of the WHO reporting. It seems that we hear complete details if a single duck shows up with H5N1 in Eureka-stan; why such a delay for major news such as H2H?

Speaking of credibility, contrast today's news with this Reuters article on December 28, 2007:

No proof of human-to-human bird flu in Pakistan No evidence that bird flu passed between relatives, WHO says

Reutersupdated 1:10 p.m. ET, Fri., Dec. 28, 2007

GENEVA -The World Health Organization said on Thursday it had established a single case of human infection of the H5N1 bird flu virus in a sick family in Pakistan but there was no apparent risk of it spreading further.

A statement from the U.N. agency said tests in its special laboratories in Cairo and London had established the “human infection” through presence of the virus “collected from one case in an affected family.”

But it said a WHO team invited to Pakistan to look into an outbreak involving up to nine people from late October to December 6 had found no evidence of sustained or community human-to-human transmission.

No identified close contacts of the people infected, including health workers and other members of the affected family, had shown any symptoms and they had all been removed from medical observation, the WHO added.

The outbreak followed a culling of infected chickens in the Peshawar region, in which a veterinary doctor was involved. Subsequently he and three of his brothers developed proven or suspected pneumonia.

The brothers cared for one another and had close personal contact both at home and in hospital, a WHO spokesman in Geneva said. One of them, who was not involved in the culling, died on November 23, but the cause of death was not known.

On November 28 another brother who had not been involved in the culling died, and tests on him — in Pakistan as well as in Cairo and London — had established the presence of the H5N1 virus.

(snip)

The WHO spokesman told Reuters on Thursday all the evidence ”suggests that the outbreak within this family does not pose a broader risk. He added: “But there is already heightened surveillance and there is a need for ongoing vigilance.”

Truth delayed, is none the less the truth. But going forward it is harder to accept what the WHO says is the truth.

Wednesday, April 02, 2008

Doctors Frustrated over Acinetobacter Infections

All the healthcare professionals that I know are good hearted people with a great capacity for compassion and a desire to heal. Doctors are, at heart, 'fixers'. So you can understand the frustration infection control professionals feel when they run out of treatment options. Consider the plight of physicians dealing with drug resistant Acinetobacter, as referenced in this article fron the UK's Telegraph:

"Pandemic fear over resistant superbug

By Stephen Adams
Last Updated: 2:20am BST 02/04/2008

Doctors have warned that if a superbug which is known to be even more resistant to antibiotics than clostridium difficile and MRSA takes hold in hospitals, the country could face a pandemic.

The acinetobacter bug is being treated with older antibiotics because newer ones do not work. There are fears that injured soldiers returning from Iraq and Afghanistan have passed the infection on in civilian hospitals.

Prof Matthew Falagas, an expert in hospital-acquired infections, said: "In some cases, we have simply run out of treatments and we could be facing a pandemic with public health implications."

He warned delegates at the Society for General Microbiology conference in Edinburgh: "Doctors in many countries have gone back to using old antibiotics that were abandoned 20 years ago because their toxic side-effects were so frequent and so bad.

"But superbugs like acinetobacter have challenged doctors all over the world by becoming resistant to these older medicines.

"Even Colistin, an antibiotic discovered 60 years ago, has recently been used. But now it occasionally fails as the bacteria has become resistant."

There are more than 1,000 reports of acinetobacter infections every year in the UK, according to the Health Protection Agency (HPA). Some strains can cause death through blood poisoning and pneumonia."


Acinetobacter is particularly difficult to remove from the environment of care because it is hearty and can survive for nearly a month in dry conditions. Healthcare providers will do their best to fight this bacterium, but turning back the clock to use older antibiotics is not a good long term strategy.

Because Acinetobacter has been proven to be transmitted via the air in several hospital studies, it is prudent to consider that the airborne route of transmission may play a role. While UVGI systems designed by VIGILAIR can help reduce environmental contamination, they are not a silver bullet. Like antibiotics, VIGILAIR is one part of a multi-faceted infection control strategy. VIGILAIR's strength lies in its ability to eliminate environmental reservoirs where microorganisms proliferate.

A VIGILAIR white paper on Acinetobacter is available here.

Wednesday, March 26, 2008

Nosocomial Infections, the next Rainmaker for Personal Injury Attorneys?

If you live where I do, you'd think that Personal Injury (PI) attorneys are doing quite well for themselves. They dominate the media here, pitching their services on TV, radio, billboards, bus benches, etc. While medical malpractice is a staple for attorneys, we now see an effort to find clients who've suffered from a Hospital Acquired Infection (HAI). Here's an example of PI marketing targeting nosocomial infections:

"Hospitals Are Profiting From Their Mistakes at Our Expense | Colorado Personal Injury Lawyers

In no other business that I know of, can you turn a profit when you sell a defective product or service. If the television set you purchased at your local electronics store doesn’t work when you get home, you take it back to the store and get a refund or exchange. When the mechanic doesn’t repair the brakes on your car properly, you don’t pay him until they’re fixed. If the bread you buy at the grocery store is moldy you take it back and get fresh loaf.

Back what if you can’t take it back? What if there are no exchanges? Suppose you go to the hospital and they cut off the wrong limb or operate on the wrong body part. You can’t take that back. You can’t get an exchange. What if not only did the hospital provided inferior care but charged you for it as well? It happens all the time at hospitals all over the United States.

An article in the Journal of American Medical Association focuses on a common but mostly preventable medical error, urinary tract infections associated with the use of a catheter. In a perverse twist, the hospitals are actually rewarded for bad care.

Urinary catheters are the most commonly used medical devices in hospitals, and account for approximately one million infections annually. That’s 40 percent of all hospital-acquired infections. A urinary tract infection can add a day to a hospital stay; and it can lead to a more serious infection and even death.

(snip)

“All too often, clinicians, hospitals, and payers conclude that some harms are part of the price of doing business. But in many cases they are not,” write Dr. Wald and Dr. Kramer. “When properly designed, financial incentives should provide rewards for desired clinical outcomes, not hospital-acquired harms.’”

Not rewarding hospitals for inferior care? All I can say is, it’s about time!"

Will HAI litigation be the next rain maker for PI lawyers? Before attorneys start the assault, they would be wise to consult epidemiologists. While many HAI can be prevented, proving negligence on the part of a hospital may prove elusive. Take a recent study from the American Journal of Infection Control(1) in which researchers looked at a database of more than 1,500 documented nosocomial outbreaks, with an eye on finding the source of the infection.

I mention this because I would think that attorneys must find the source or cause of a HAI in order to punish the responsible party. Among the findings: the source of the pathogen was unknown for a significant proportion of the outbreaks. Below are outbreak pathogens, followed by the percentage of times their source in an outbreak could not be determined:

Pathogen
Source of pathogen outbreak not known (%)
Staphylococci 43.5%
Pseudomonas 37.2%
Klebsiella 58.3%
Acinetobacter 36.2%
Serratia 31.9%

Clearly, the study has limitations, but if anything it is biased in favor of outbreaks that have a reported source, as those are more likely to be the subject of a published study.

Consider MRSA. According to the CDC, in 2005:

"Approximately 18,650 persons died during a hospital stay related to these serious MRSA infections.

Serious MRSA disease is still predominantly related to exposures to healthcare delivery:

  • About 85% of all invasive MRSA infections were associated with healthcare, and of those, about two-thirds occurred outside of the hospital, while about one third occurred during hospitalization.
  • About 14% of all the infections occurred in persons without obvious exposures to healthcare."

Trying pointing the finger of blame at a hospital when two-thirds of the MRSA appears to be contracted in the community and then brought into the hospital. Who do you sue?

The bit that I understand about epidemiology tells me that in regards to litigation over HAI, large paydays are not in the cards for PI attorneys. Even with all our diagnostic tools, it is expensive and labor intensive to prove empirically that this bug caused that infection and can from this place. Not impossible, but PI lawyers are going to go where the easy money is. Hospitals are likely to defend themselves with credible medical experts who will educate jurors that infections involve microbiology, epidemiology and the physical environment. Modeling these diverse disciplines is science and art.

Having said the above, I would image that the threat of lawsuits will have more of an impact on healthcare. When you couple that threat and impending regulation changes in reimbursement, hospital administrators are doing the right thing and trying to reduce HAI. Our product, VIGILAIR, is on an excellent resource to help them achieve that goal.

I would be remiss if I didn't comment on the attorney article that opened this piece. The author says that consumers should not pay for services with a negative outcome. I wish all attorneys worked on this premise.


1. Gastmeier, S. Stamm-Balderjahn, S. Hansen, I. Zuschneid, D. Sohr, M. Behnke, R. Vonberg, H. RĂ¼den. Where should one search when confronted with outbreaks of nosocomial infection?. American Journal of Infection Control, Volume 34, Issue 9, Pages 603-605 P.

Tuesday, March 25, 2008

The war on hospital acquired infections, fighting on two fronts

Ok, so it's an old analogy, but it works. Imagine being at war. You're a general tasked with disrupting the enemy's supply chain. The enemy has trains, boats and trucks that carry supplies, but it also has factories where supplies are built and depots, camps and ports where large quantities of supplies are stored.

What is your bombing strategy? Do you hit the individual vessels of supplies, or do you attack where the supplies are produced and stored?

The answer is you bomb both.

And so it goes for infection control. Enforcing hand washing protocols is a good start. Hands are like the boats and trains; they're vessels that deliver supplies (infections). But if you only attack the supply carriers, some are likely to get through and new routes will open as soon as the old ones are closed.

That's why it is important to also attack the factories and staging places for supplies. For infection control, this means looking at the source of pathogens and the reservoirs in which they hide. Individually each of these tactics are good, but together, their strategic value is much greater.

I thought of this tired analogy after reading a study (1) that says previous contamination of a hospital care area is an excellent predictor of future infection. Here's an overview of the study from infectious disease dot com:
Patients may be at an increased risk for vancomycin-resistant enterococci in health care settings if they are treated in areas where contamination with vancomycin-resistant enterococci has previously occurred, according to the results of a new study, which were published in Clinical Infectious Diseases.

Prior room contamination is highly predictive of vancomycin-resistant enterococci (VRE) acquisition, according to the study’s researchers, who stressed that increased attention to environmental disinfection is warranted to help reduce the risk for VRE infection.

“Everyone on the health care team — from doctors, to nurses, to medical students, to technicians — needs to take personal responsibility for preventing infections,” Marci Drees, MD, from the Center for Outcomes Research at Christiana Care Health System in Newark, Del., and one of the study’s researchers, told Infectious Disease News. “I think for too long we’ve had the attitude that these infections ‘just happen’ and are bad luck, but we now know that many are preventable. Preventing infections comes down to the basics: universal handwashing, wearing gowns and gloves when appropriate and thorough environmental cleaning. It’s easy to cut a corner here and there when you’re busy taking care of patients, but that’s how these infections happen.”
(snip)
Three of the most significant factors associated with the risk for a VRE infection included sharing a room with a VRE-colonized patient, being treated in a room where a VRE-colonized patient had been treated within the past two weeks and being treated in a room with previous positive culture results.
To put a fine point on it, infection control professionals are fighting on several fronts. Hand washing is an important tactic. We should remember, however, that hands don't produce many pathogens--although they do a fine job of transporting them.


Where are the microorganism 'factories'? Among the places in a hospital where microorganisms are produced is the Heating Ventilation and Air Conditioning (HVAC) system. Our staff members have hundreds of data points taken from microbial swabbing of hospital HVAC surfaces. We find that the same microorganisms that cause infection are found thriving on cooling coils, drain pans and water inside hospital air handlers. Pathogens that are commonly cultured on hospital cooling coils include:
  • Pseudomonas
  • Acinetobacter
  • Staphylococcus
VIGILAIR is like a carpet bomber for these pathogens. But unlike bombing, whose effects are transitory, VIGILAIR eliminates reservoirs for microbial growth and prevents them from returning.

Now, onward infection control soldier!



1. Drees M, Snydman DR, Schmid CH, et al. Prior environmental contamination increases the risk of acquisition of vancomycin-resistant enterococci. Clin Infect Dis. 2008;46:678-685.

Wednesday, March 12, 2008

Study: MRSA Screening Fails to Lower Infection Rates

A new study published in the Journal of the American Medical Association says that universal MRSA screening upon admission to a hospital may not lead to fewer MRSA infections. The study compared two sets of surgery patients who received services at a Swiss hospital.

One group of more than 10,000 patients were screened for MRSA prior to surgery. If they tested positive for MRSA they were isolated and treated with disinfectant and antibiotics. The control group was of similar size and was not screened. Results from the study show no significant differences in the infection rates between the two groups.

From the Chicago Tribune:

"This is what we've been saying all long," said Kathy Warye, chief executive officer of the Association for Professionals in Infection Control and Epidemiology, a group that opposes efforts to mandate MRSA testing.

While screening patients can be a valuable, it's not a "magic wand" and it's not always the best way to deploy a medical institution's resources, said Dr. Stephen Weber, director of infection control at the University of Chicago Hospitals

Critics of the report's findings say the study may've overlooked some pre-existing MRSA reservoirs:

"Dr. Barry Farr, a MRSA expert, noted the Swiss hospital didn't screen patients on medical wards, who probably served as a reservoir of MRSA infections within the institution and skewed the study's results.

About one-third of surgery patients at the Swiss hospital had surgery before measures could be taken to control potential MRSA infections; that may have contributed to the findings, said Dr. Karen Kaul, chair of molecular pathology at Evanston Northwestern Healthcare."

Responses from both sides (pro and con) augment a central argument in VIGILAIR's infection control (IC) strategy.

  • We believe that IC is dynamic and multifaceted
  • There is no one strategy to eliminate infection
  • There are many reservoirs of infection including patients, healthcare workers and the environment
  • A prudent IC policy attacks pathogen reservoirs on several fronts simultaneously; bundling strategies works best

So, Now What?

MRSA screening has resulted in significant benefit for other facilities, notably Scandinavian hospitals that have virtually eliminated nosocomial MRSA infection after implementing 100% screening upon admission. This new study is not enough justification for a wholesale discrediting of MRSA screening. It is, however, more evidence that IC is more like a web than a chain. Breaking one link of transmission rarely does the trick.

Wednesday, March 05, 2008

Keeping the Food Supply Safe

New UVGI Tunnel Keeps Food Supply Safe

In addition to controlling contaminants for healthcare and bio-defense clients, VIGILAIR is also involved in nutraceutical manufacturing.

Companies that produce food want to keep pathogens such as e. sakazakii, salmonella and e.coli out of their products. Our research and development team has been hard at work, creating a customized solution to this problem.

Our answer comes in the form of a UVGI Tunnel. Each tunnel is custom designed to integrate into an existing or new production line. Our high intensity UV Tunnels disinfect packaging materials as they pass along the conveyor line. Our tunnels have demonstrated exceptional results, earning a 7 log kill on pathogens that are problematic for nutritional manufacturers.

Find out more by downloading our media release.


Wednesday, February 20, 2008

Why the Space Shuttle needs VIGILAIR®

Remember the Michael Crichton thriller 'The Andromeda Strain'? The story focuses on the efforts of scientists who investigate a deadly microbe from outer space that came to earth via a satellite that crashed in a small US town, killing all but two of the residents.

That's the first thing that came to mind when I read the abstract for a study published in the Proceedings of the National Academy of Sciences, entitled Space flight alters bacterial gene expression and virulence and reveals a role for global regulator Hfq. Researchers discovered that strains of Salmonella that were sent into outer space changed and became more virulent.

Here's a bit of the study's findings via Natural News, by reporter David Gutierrez:

"Researchers placed strains of Salmonella typhimurium, a common food-poisoning agent, into two separate containment canisters. One of the canisters was sent into outer space for 12 days, while the other remained in the Orbital Environmental Simulator at Kennedy Space Center. The environmental simulator remained in constant communication with the space shuttle, immediately replicating in real-time whatever temperature and humidity conditions were being experienced in the vessel. This allowed the two groups of bacteria to be exposed to identical conditions, except for the fact that one group was under microgravity conditions in outer space."

The Salmonella taken into space returned with changed expression of 167 different genes, a sign that microorganisms adapted to the zero gravity environment. Although the Andromeda Strain dealt with extraterrestrial bugs, and this study examines terrestrial bugs, imaginative people could find parallels.

How does this relate to airborne infection? This research confirms that nature will always try to adapt to survive in its environment. Antibiotics have worked well for many years, but now nature has adapted yielding 'multidrug resistant organisms, AKA Super Bugs. VIGILAIR® inactivates viruses, bacteria and fungi by corrupting the genetic map that organisms need to reproduce.

So, NASA, call whenever you're ready, operators are standing by...

Thursday, February 14, 2008

Killer in the NICU

From my adopted college town of Manchester, the sad story of a NICU death likely caused by airborne aspergillus:

"Baby ward hit by fatal infection
A Greater Manchester hospital has temporarily closed its neo-natal unit after a baby died and another suffered a potentially fatal infection.

A premature baby developed an infection from aspergillus, a common airborne fungus, and died in December at Salford Royal Hospital.

A second pre-term baby tested positive for skin aspergillus last week.

The hospital said it had closed the ward as a precaution to establish any "common contributory factors".

The aspergillus fungus is very common and can be found in homes and buildings everywhere, but can cause infections."

Many studies have shown that aspergillus is ubiquitous in the environment. Healthy people can be exposed to it without serious consequences. That is not true for immune compromised patients in ICU areas. So, what to do about it?

How about filtering the air? Hospitals already do that and yet aspergillus persists. How about letting in more fresh air? This strategy will introduce more and potentially different types of aspergillus into the hospital. What about cleaning the HVAC frequently to get rid of pathogens?

Studies have shown that traditional cleaning is not effective, as this report(1) from the ECMM shows:

"It appears that fungal spores are not necessarily removed by cleaning the fans. Even scratching and painting them, to eliminate rust and restore a smooth surface on which fungal spores cannot be retained, does not permit decontamination."

In fact, servicing the HVAC can exacerbate the problem(2):

"Our observations suggest that localized, short-term exposures resulting from disturbance of (aspergillus) reservoirs are comparable to or may even greatly exceed maximum expected routine exposures. Further, these reservoirs may be disturbed not just during construction or renovation, but even during routine maintenance activities (telecommunications cabling, HVAC filter replacement) that require access to ceiling spaces."

It is clear that the unique needs of ICU areas need unique solutions. That's where VIGILAIR® comes in. VIGILAIR® Systems combine filtration and the germicidal effect of UVC. Rather than just trapping aspergillus spores, VIGILAIR® is designed to provide enough UVC exposure (dose) to destroy aspergillus. UV technology disinfects HVAC surfaces and then keeps those areas clean by continuously radiating the reservoirs where microorganisms can thrive.

Once again, we need to be aware than Infection Control is an environmental issue. Diligent IC professionals must recognize and remove all reservoirs for pathogen growth within the hospital. Unfortunately, the HVAC system is frequently overlooked as a reservoir despite the fact that it houses the largest untreated water supply within a health care facility.

1. European Confederation of Medical Mycology Conference 1996. S. Heinemann, G. Van. houte, N. Nolard. Contamination of indoor environment and air conditioning.
2. European Confederation of Medical Mycology Conference 2008. Khan M, Gonsoulin T, Simpson S, Horner WE. Exposure levels of aspergillus fumigatus from various indoor reservoirs in health care facilities.

Friday, February 08, 2008

Echos in the media

It is encouraging to see response from the press over the recent report on hand washing and infection control. The argument that infection control is dynamic and environmental is being heard in the media, and from APIC! See the recent article from US News and World Reports:

Wringing Our Hands Over Infection Control

February 07, 2008 05:19 PM ET | Avery Comarow |
A number of thoughtful comments arrived concerning my January 23 hand-washing post, about a study showing that a much-increased rate of hand-washing is no guarantee that a hospital's infection rate will budge, let alone dive. A couple of correspondents (notably anesthesiologist-blogger Counting Sheep and hospital-CEO-blogger Paul Levy of "Running a Hospital") contributed thoughts that might prevent a few infections here and there.


The following came as a real letter, if also as an E-mail attachment, from Kathy Warye, another CEO. She runs the Association for Professionals in Infection Control and Epidemiology, whose obvious interest in this subject makes her note very welcome.


"Mr. Comarow makes a critical point that even the single most effective intervention (in this instance, hand hygiene) alone can't solve the problem of healthcare-associated infections. Certainly, even the best hand hygiene compliance only gets us so far.

Lessons learned from our 12,000 members who manage infection prevention programs in healthcare facilities around the world tell us that to reduce the risk of infection and protect people coming into hospitals means adopting a full range of strategies. The first step, from a facility-wide perspective, is conducting a proper risk assessment. Good infection prevention and control professionals don't just know their patients—they know their hospital, they know which areas are at high risk and where there may be hidden reservoirs of bacteria, be it the ER or the OR.


System-wide adoption of proper hand hygiene, contact precautions including use of gloves and gowns, and the "checklist" for device-related care that is receiving so much attention of late are among the tools known to be effective in preventing healthcare-associated infections."


Amen! The single largest source of untreated water in any hospital is its HVAC system. For Critical Care Units aerving the most immune compromised patients, we must eliminate the HVAC as a reservior for pathogens. While VIGILAIR is not a panacea, neither is washing hands. Our technology needs to complement other technologies and institutional efforts for infection control.