Abstract

Mechanically ventilated patients often develop ventilator-associated pneumonia (VAP). Soon after intubation, a mixed biofilm harboring microbial pathogens is formed on the endotracheal tube (ET). It is believed that this biofilm contributes to the development of VAP. Unfortunately, the causative agent is often not known at the time VAP is suspected, and early therapy often relies on the identification of surveillance cultures (SC). It is thus important to know whether these SC can predict the microbial flora in ET biofilms. In this study, we compare the presence of a number of antibiotic-resistant nosocomial bacteria (Enterobacter aerogenes, Escherichia coli, Micrococcus luteus, Pseudomonas aeruginosa, Staphylococcus aureus, and Staphylococcus epidermidis) and of Candida albicans in cultures from ET biofilms and SC (i.e. sputum samples, nose swabs, and throat swabs) of 20 mechanically ventilated patients. Our data indicate that there is a good correlation between the presence of (antibiotic-resistant) pathogens in ET biofilms and SC.

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