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Comparison Of Double Disc And Combined Disc Method For The Detection Of Extended Spectrum Beta Lactamases In Enterobacteriaceae, K Jabeen, A Zafar, R Hasan
Comparison Of Double Disc And Combined Disc Method For The Detection Of Extended Spectrum Beta Lactamases In Enterobacteriaceae, K Jabeen, A Zafar, R Hasan
Department of Pathology and Laboratory Medicine
Objective:
To compare double disc approximation and combined disc method for their ability to detect extended spectrum b lactamase (ESBL) production in enterobacteriaceae and determine the percentage of isolates which are falsely reported as sensitive in absence of ESBL detection, in a clinical microbiology laboratory of a tertiary care hospital between September-October 2002.
Methods:
Selected isolates were identified according to standard biochemical tests. Disc susceptibility tests were performed according to NCCLS. ESBL detection by combined disc [cefotaxime (30 ug) versus cefotaxime plus clavulanate (30+10 ug)] was compared with detection using double discs [amoxy-clavulanic acid (20+10 ug) and aztreonam (30 ug) …