The use of antibiotic-containing agars for the isolation of extended-spectrum β-lactamase-producing organisms in intensive care units |
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Authors: | G. Wilson D. McCabe |
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Affiliation: | Department of Medical Microbiology, Stirling Royal Infirmary, Stirling, UK. gwilson44@btinternet.com |
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Abstract: | MacConkey agar containing either cefotaxime 1.0 mg/L or ceftazidime 1.0 mg/L was evaluated for use in screening for extended-spectrum beta-lactamase (ESBL)-producing organisms. The media were evaluated using known ESBL-positive and -negative strains and 630 clinical specimens over a 6-month period. All Enterobacteriaceae isolated were identified and screened for ESBL production by phenotypic methods. In total, 14 ESBL-producing organisms were detected in the clinical samples. All known ESBL-positive strains were also detected. The use of both screening plates was required to detect all ESBLs. |
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Keywords: | Detection Enterobacteriaceae extended-spectrum β-lactamases MacConkey selective agars screening media surveillance |
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