beta-lactamase

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beta-lactamase

[¦bād·ə ′lak·tə‚mās]
(microbiology)
A bacterial enzyme that catalyzes the hydrolysis of the lactam ring in some penicillin antibiotics, rendering them ineffective.
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References in periodicals archive ?
Detection and reporting of beta lactamases producer is responsibility of every clinical Microbiologist.
Emerging therapeutic problem faced by most of the clinicians and microbiologist is the presence of Plasmid mediated Amp C beta lactamases in the microorganisms commonly isolated from various clinical specimens.
In vivo selection of cephamycin-resistant, porin-deficient mutants of Klebsiella pneumoniae producing TEM-3 beta lactamase. J Infect Dis 1989;159(5):1005-6.
Frequency and sensitivity pattern of extended spectrum beta lactamase producing isolates in a tertiary care hospital laboratory of Pakistan.
Prevalence of extended-spectrum beta lactamase in Escherichia coli strains isolated from urinary tract infection.
1: Beta lactamase in Coagulase negative and positive Staphylococcus isolated from foods Frequence of Beta Lactamase Stpahylococcus aureus 77% Coagulase negative Stpahylococcus 73% Note: Table made from bar graph.
Treatment failure due to extended spectrum beta lactamase. J Antimicrob Chemother 1996; 37 : 203-4.
Resistance extended spectrum cephalosporins caused by PER-1 beta lactamase, in Salmonella typhimurium in Istanbul, Turkey.
Three Dimensional Extract Test (3DET) was used as standard phenotypic method to detect Amp C beta lactamase production.9 First, 0.5 McFarland bacterial suspensions were prepared from an overnight culture.