Zavascki AP, Goldani LZ, Gonçalves ALS, Martins AF, Barth AL. High prevalence of metallo-beta-lactamase-mediated resistance challenging antimicrobial therapy against Pseudomonas aeruginosa in a Brazilian teaching hospital.
Epidemiol Infect 2006;
135:343-5. [PMID:
16824253 PMCID:
PMC2870577 DOI:
10.1017/s0950268806006893]
[Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/10/2006] [Indexed: 01/21/2023] Open
Abstract
The prevalence of metallo-beta-lactamase (MBL) production among Pseudomonas aeruginosa nosocomial isolates from a Brazilian teaching hospital was determined. A total of 512 P. aeruginosa isolates were recovered from 245 patients during a 10-month period. Ninety-four (38.4%, 95% CI 32.2-44.8%) isolates were MBL producers. Most resistance to beta-lactams was mediated by MBL. Forty-one (16.7%) were resistant to all drugs except polymyxin B and 33 (80.5%) of these were MBL producers. Clonal dissemination, documented by DNA macrorestriction, played a major role for the spread of MBL isolates. The blaSPM-1 gene was demonstrated by PCR in 14 randomly selected MBL isolates. The extremely high prevalence of MBL production found challenges the choice of therapeutics for P. aeruginosa, and measures to control horizontal dissemination of MBL producers are urgently required.
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