detection of extended spectrum beta-lactamase from clinical isolates in davangere

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ID: 189222
2008
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Abstract
Extended spectrum β-lactamase enzymes (ESBLs) are enzymes that have the ability to hydrolyze oxyiminocephalosporins and infections by isolates producing them are often difficult to treat. A study to detect the presence of these enzymes in isolates was conducted by our hospital. A total of 207 non repetitive isolates were screened for resistance to any of five screening agents. Those with suspicious profiles were checked for ESBL production by double-disk approximation or a synergy test. The isolates were also subjected to a phenotypic confirmation test as recommended by CLSI (formerly NCCLS). Various cephalosporins-β-lactamase inhibitor combinations were also tested. Of the 204 (98.5%) screen-positive isolates, only 126 (61.7%) were identified as ESBL producers. Of these, 26.1% of the isolates were positive by using the double-disk synergy test (DDST) method alone, 13.4% were positive using the method recommended by CLSI, and 60.3% of the isolates were positive by both the DDST and CLSI methods. We also report a high percentage of resistance to cefoxitin (96.8%) indicating changes in porins.
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Authors Sridhar Rao P, Basavarajappa K, Krishna G
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Journal journal of materials processing technology
Year 2008
DOI
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http://www.ijpmonline.org/article.asp?issn=0377-4929;year=2008;volume=51;issue=4;spage=497;epage=499;aulast=Sridhar
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