Greater Hospital Vigilance Urged Over Water Systems in Summer

Patients who are vulnerable to infection run a greater risk of contracting Legionnaires’ disease, a severe form of pneumonia, during warm, humid weather, according to a study published in the Journal of Infectious Diseases. The infection is caused by Legionella bacteria that can live in hospital water systems and throughout the environment.

Legionella bacteria, while usually not a problem for healthy adults, can be most serious and even fatal for patients who are immune compromised, including those in Intensive Care Units, the very young and the very old, the chronically ill, and post-surgical, cancer and transplant patients. These patients risk becoming infected through a buildup of microbes that can inhabit a hospital’s water system, where they have oftentimes become resistant to traditional methods of cleaning and disinfection.

At-risk patients can become ill through any exposure to hospital water, whether through ingestion, comforting mouth sores with ice cubes, bathing, inhalation of shower mist or being treated with equipment washed in hospital water.

“Many healthcare professionals aren’t aware of what’s lurking in their water in the summer or any season, especially the water used with critically ill and at-risk patients. As a result, countless Legionella and other harmful microorganisms that can cause serious infections go undetected,” says Janet Stout, an international expert on Legionella and other microbes in hospital water.

Stout, director of the Special Pathogens Laboratory and a microbiologist at the University of Pittsburgh, is a strong advocate for reducing the risk of waterborne infection in hospitals, nursing homes and other healthcare facilities. She is on a mission to get these institutions to test their water and then do something about it.

Speaking at the annual conference of the Association for Professionals in Infection Control and Epidemiology (APIC) in San Jose, California, Stout shared stories that vividly illustrated the problem:

• A hospital’s Burn Unit treated its badly burned patients with a cooling water spray to ease their pain…until it was discovered that the water was loaded with dangerous, infection-causing microbes.
• Another hospital, attempting to prevent the spread of infection, installed non-touch faucets. But a study found that every faucet tested positive for Legionella bacteria, and that 74 percent were also contaminated with Pseudomonas aeruginosa, another bacterium associated with serious, often fatal, pneumonia.

Patients, their families and caregivers need to be aware of the potential for waterborne infection any time they are hospitalized, particularly if they are seriously ill or undergoing treatment that affects their immune systems, according to Stout.

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