alexa Prevalence of multidrug-resistant organisms recovered at a military burn center.
Pharmaceutical Sciences

Pharmaceutical Sciences

Journal of Pharmaceutical Care & Health Systems

Author(s): Keen EF rd, Robinson BJ, Hospenthal DR, Aldous WK, Wolf SE,

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Abstract Infections caused by multidrug-resistant (MDR) pathogens are associated with significant morbidity and mortality in patients with burn injuries. We performed a 6-year antibiotic susceptibility records review from January 2003 to December 2008 to assess the prevalence of MDR isolates by pathogen at the US Army Institute of Surgical Research Burn Center. During the study period Acinetobacter baumannii (780 isolates [22\%]) was the most prevalent organism recovered, followed by Pseudomonas aeruginosa (703 isolates [20\%]), Klebsiella pneumoniae (695 isolates [20\%]), and Staphylococcus aureus (469 isolates [13\%]). MDR prevalence rates among these isolates were A. baumannii 53\%, methicillin-resistant S. aureus (MRSA) 34\%, K. pneumoniae 17\% and P. aeruginosa 15\%. Two isolates, 1 A. baumannii and 1 P. aeruginosa, were identified as resistant to all 4 classes of antibiotics tested plus colistin. A. baumannii isolates recovered from patients with burns greater than 30\% of total body surface area (TBSA) were more likely to be MDR (61\%) with no significant difference for P. aeruginosa and K. pneumoniae. A higher proportion of MDR P. aeruginosa isolates were recovered from respiratory specimens compared to blood specimens (24\% vs. 9\%) while the opposite was true for MRSA (35\% vs. 54\%). A comparison of A. baumannii recovered during hospitalization days 1-5 and 15-30 revealed higher MDR levels as length of stay increased (48\% vs. 75\%) while no significant trends were observed for P. aeruginosa and K. pneumoniae. A similar pattern was observed for MDR A. baumannii levels for the facility between 2003 and 2005 and 2006-2008 (39\% vs. 70\%), with no significant increase in MDR P. aeruginosa and MDR K. pneumoniae. Increasing antibiotic resistance patterns of the most prevalent isolates recovered during extended hospitalization, impact of \% TBSA and other clinical parameters may affect empirical antimicrobial therapy and patient management decisions during treatment. Published by Elsevier Ltd. This article was published in Burns and referenced in Journal of Pharmaceutical Care & Health Systems

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