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Fluoroquinolone Resistance Linked to GyrA, GyrB, and ParC Mutations in Salmonella enterica Typhimurium Isolates in Humans
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Nov 2003
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Source: Emerg Infect Dis. 9(11):1482-1483.
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Alternative Title:Emerg Infect Dis
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Description:We report two cases of infection with clonally unrelated, high-level ciprofloxacin-resistant, β-lactamase–producing strains of | 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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