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.
Frequency of extended spectrum betalactamase (ESBLs) producing Escherichia coli and Klebseilla pneumoniae isolated from urine in an Iranian 1000 bed tertiary care hospital.
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.
Despite sensitivity in vitro, all strains produced an inducible betalactamase.
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.
Epidemiology of ciprofloxacin resistance and its relationship to extended-spectrum betalactamase production in Klebsiella pneumonia isolates causing bacteremia.
5g/1000mL) to isolate resistant gram negative bacteria producing metallo betalactamase.
International prospective study of Klebsiella pneumoniae bacteremia: implications of extended-spectrum betalactamase production in nosocomial infections.
Prevalence of extended-spectrum betalactamase in Escherichia coli strains isolated from urinary tract infection.
Foi observada a resistencia a oxacilina em 18 (54,5%) isolados, porem, nenhuma amplificacao por PCR do gene mecA foi observada nos isolados, o que pode sugerir a perda do gene ou uma hiperproducao de betalactamase.