Coproduction of novel 16S rRNA methylase RmtD and metallo-beta-lactamase SPM-1 in a panresistant Pseudomonas aeruginosa isolate from Brazil.

ABSTRACT: Serious infections with Pseudomonas aeruginosa are frequently treated with the combination of a beta-lactam antimicrobial and an aminoglycoside. P. aeruginosa strain PA0905 was isolated in 2005 from an inpatient in Brazil. It showed a panresistant phenotype that included resistance to beta-lactams, aminoglycosides, and fluoroquinolones. The beta-lactam resistance was conferred by the production of the metallo-beta-lactamase SPM-1. No inhibitory zone was observed when a disk diffusion test was performed with the semisynthetic aminoglycoside arbekacin, raising suspicion of 16S rRNA methylase production. A cloning experiment subsequently revealed the presence of a novel 16S rRNA methylase, RmtD, which accounted for the high-level resistance to all 4,6-disubstituted deoxystreptamine aminoglyco

SUBMITTER: Doi Y 

PROVIDER: S-EPMC1803107 | biostudies-literature | 2007 Mar

REPOSITORIES: biostudies-literature