Fluoroquinolone Resistance Linked to GyrA, GyrB, and ParC Mutations in Salmonella enterica Typhimurium Isolates in Humans

We report two cases of infection with clonally unrelated, high-level ciprofloxacin-resistant, β-lactamase–producing strains of Salmonella enterica Typhimurium. Resistance was caused by four topoisomerase mutations, in GyrA, GyrB, and ParC and increased drug efflux. Ciprofloxacin treatment failed in...

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Detalles Bibliográficos
Autores principales: Casin, Isabelle, Breuil, Jacques, Darchis, Jean Pierre, Guelpa, Claire, Collatz, Ekkehard
Formato: Texto
Lenguaje:English
Publicado: Centers for Disease Control and Prevention 2003
Materias:
Dispatch
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3035553/
https://www.ncbi.nlm.nih.gov/pubmed/14718091
http://dx.doi.org/10.3201/eid0911.030317
Descripción
Sumario:We report two cases of infection with clonally unrelated, high-level ciprofloxacin-resistant, β-lactamase–producing strains of Salmonella enterica Typhimurium. Resistance was caused by four topoisomerase mutations, in GyrA, GyrB, and ParC and increased drug efflux. Ciprofloxacin treatment failed in one case. In the second case, reduced susceptibility to third-generation cephalosporins occurred after initial treatment with these drugs and may explain the treatment failure with ceftriaxone.

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