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JCPSP-Journal of the College of Physicians and Surgeons Pakistan. 2013; 23 (9): 629-632
en Inglés | IMEMR | ID: emr-148077

RESUMEN

To compare the sensitivity and specificity of different phenotypic methods for detection of Amp C beta-lactamase producing bacteria. Analytical study. Department of Microbiology, Army Medical College / National University of Sciences and Technology [NUST], Islamabad, Pakistan, from June 2010 to December 2010. A total of 150 clinical isolates were screened for presence of Amp C beta-lactamase by using the cefoxitin disc. The confirmatory methods evaluated were inhibitor based assay [boronic acid], Amp C disc test and Amp C Etest. Three dimensional enzyme extract assay was used as the reference method for determining the sensitivity and specificity. Among the total isolates tested, 62.8% bacteria showed the presence of Amp C beta-lactamase by standard three dimensional enzyme extract assay. Among the three methods compared, boronic acid disk test found out to be highly sensitive [88%] and specific [92%] for the detection of Amp C beta-lactamase producing bacteria. Detection of Amp C production is crucial in order to establish the antibiotic therapy and to attain the favourable clinical outcomes. Implementation of simple tests like boronic acid disk tests in the laboratories will help to alleviate the spread of Amp C beta-lactamase harboring organisms

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