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Study finds environmental tests help predict hospital-acquired Legionnaires' disease risk
Date:8/22/2007

PITTSBURGH, Aug. 22 A new study spearheaded by the University of Pittsburgh School of Medicine has determined that environmental monitoring of institutional water systems can help to predict the risk of hospital-acquired Legionella pneumonia, better known as Legionnaires disease. Reported recently in the journal Infection Control and Hospital Epidemiology, the 20-hospital study also calls for reconsideration of the current national infection-control policy to include routine testing of hospital water systems for Legionella, the bacterial group associated with Legionnaires.

Only those hospitals that had high levels of Legionella bacteria in their water systems had patients who contracted Legionnaires disease, senior author Victor L. Yu, M.D., professor of medicine at the University of Pittsburgh School of Medicine, said of the study, which involved hospitals in 14 states. Proactive monitoring of the hospital water supply alerted physicians to the hidden risk of Legionnaires disease for their patients.

Legionella bacteria first were identified as causing pneumonia in 1976 following an outbreak among attendees at an American Legion convention at a Philadelphia hotel, resulting in the name Legionnaires disease. With an average fatality rate of 28 percent, Legionnaires is estimated to be responsible for up to 20,000 cases a year in the United States, many of them hospital-acquired. Currently, the U.S. Centers for Disease Control and Prevention recommends that hospitals and other health care institutions monitor patients for pneumonia incidence before doing environmental surveillance of water systems that can harbor the bacteria.

Based in part on our work, and in collaboration with the Allegheny County Health Department and the Three Rivers Association for Professionals in Infection Control, the development of proactive guidelines for hospital-acquired Legionnaires disease prevention has led to the virtual disappearance of this infecti
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Contact: Michele Baum
BaumMD@upmc.edu
412-647-3555
University of Pittsburgh Schools of the Health Sciences
Source:Eurekalert

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