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ORIGINAL ARTICLE
An outbreak of hospital-acquired Pseudomonas aeruginosa infection caused by contaminated bottled water in intensive care units
德国一起因瓶装水被污染而导致的ICU铜绿假单胞菌爆发感染
T. Eckmanns11Robert Koch Institute, M. Oppert22Department of Nephrology, Medical Intensive Care, M. Martin33Institute for Hygiene and Environmental Medicine, Charité-Universitätsmedizin Berlin, Humboldt University, Berlin, Germany, R. Amorosa33Institute for Hygiene and Environmental Medicine, Charité-Universitätsmedizin Berlin, Humboldt University, Berlin, Germany, I. Zuschneid11Robert Koch Institute, U. Frei22Department of Nephrology, Medical Intensive Care, H. Rüden33Institute for Hygiene and Environmental Medicine, Charité-Universitätsmedizin Berlin, Humboldt University, Berlin, Germany and K. Weist33Institute for Hygiene and Environmental Medicine, Charité-Universitätsmedizin Berlin, Humboldt University, Berlin, Germany1Robert Koch Institute, 2Department of Nephrology, Medical Intensive Care and 3Institute for Hygiene and Environmental Medicine, Charité-Universitätsmedizin Berlin, Humboldt University, Berlin, Germany
Corresponding author and reprint requests: T. Eckmanns, Robert Koch Institute, Seestr. 10, 13393 Berlin, Germany
E-mail: eckmannst@rki.de
Abstract
This study describes an outbreak of Pseudomonas aeruginosa infections caused by contaminated bottled still water (BSW) in six intensive care units (ICUs) of a German university hospital. Clinical and environmental samples from these units were cultured and genotyped by amplified fragment-length polymorphism and pulsed-field gel electrophoresis analysis. Microbiological results were reviewed on a weekly basis to determine the number of P. aeruginosa infections and colonisations of ICU patients. Clinical specimens from 19 ICU patients—15 infections and four colonisations—yielded the same strain of P. aeruginosa. Furthermore, four of 103 environmental samples also yielded P. aeruginosa. However, only a P. aeruginosa strain isolated from unopened BSW was genetically identical to the P. aeruginosa strain isolated from the patients. In the 42-week period before the outbreak, the mean weekly number of new ICU patients infected or colonised with P. aeruginosa was 46.9 (95% CI 40.7–53.1)/1000 bed-days. During the 6-week period of the outbreak, the weekly number of new patients with P. aeruginosa was 88.9 (95% CI 54.3–122.2)/1000 bed-days. This number returned to the previous level after removal of the BSW. Thus, the microbiological and epidemiological findings revealed that the outbreak was related to BSW contaminated with P. aeruginosa. It was concluded that all untested BSW should be removed from ICUs.
j.1469-0691.2008.01949.pdf
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