beta-lactamase

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Related to Betalactamase: ESBL

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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Se o paciente for candidato cirurgico, sugerese manter ampicilina e gentamicina, evitando o uso de ceftriaxona precocemente, com inducao de betalactamases com possivel disseminacao em unidades fechadas.
coagulase-negativos provenientes de amostras coletadas de animais e humanos apresentaram elevada resistencia a penicilina e a ampicilina, sendo a associacao beta-lactamico mais inibidor de betalactamase o antibiotico que apresentou menor percentual de resistencia nos isolados do conduto auditivo, possivelmente pelo uso restrito na terapeutica veterinaria.
Phenotypic detection of AmpC betalactamase among anal Pseudomonas aeruginosa isolates in a Nigerian abattoir.
False positivity (resistant to oxacillin but sensitive to cefoxitin and negative for mecA gene) in ORSA methods and E-Test is due to the hyper production of betalactamase which may lead to phenotypic expression of oxacillin resistance do not possess the usual genetic mechanism for such resistance.
This was later confirmed to be extended-spectrum betalactamase (ESBL)-producing S.
Parallel increase in community use of fosfomycin and resistance to fosfomycin in extended-spectrum betalactamase (ESBL)-producing Escherichia coli.
The combination of Ceftriaxone (3rd generation Cephalosporin) and Tazobactam (Betalactamase inhibitor) provides a solution for treatment of such bacterial infections caused beta lactam resistant pathogens (Susic, 2004).
Epidemiology of ciprofloxacin resistance and its relationship to extended-spectrum betalactamase production in Klebsiella pneumonia isolates causing bacteremia.
coli colonies were purple with green metallic sheen.Molecular analysis for the presence of metallo-AY- lactamase blaNDM-1 geneIsolation of resistant strainsEach water sample was also inoculated onMacConkey's media supplemented with meropenem antibiotic (0.5g/1000mL) to isolate resistant gram negative bacteria producing metallo betalactamase. Isolated strains were further subcultured on meropenem containing MacConkey's media plates to get pure and resistant strains.
Prevalence of extended-spectrum betalactamase in Escherichia coli strains isolated from urinary tract infection.
Horizontal dissemination of TEM- andSHV-type betalactamase genes carrying resistance plasmids amongst clinical isolates of Enterobacteriaceae.
Prevalence of extended spectrum betalactamase producing Escherichia coli in a tertiary care hospital in Tehran, Iran, Int.