In Vivo Acquisition of Extended-spectrum Beta-lactamase in Salmonella Enteritidis During Antimicrobial Therapy
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Microbiology
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The recovery of a Salmonella enteritidis strain that acquired resistance to beta-lactams (including cefotaxime), to aminoglycosides and to chloramphenicol subsequent to cefotaxime therapy is reported. This resistance pattern to beta-lactams was due to the presence of an extended-spectrum beta-lactamase. The isoelectric point of this extended-spectrum beta-lactamase was 6.3. The resistance genes were located on a transferable high-molecular-weight plasmid.
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