MUTATIONS OF THE GYRA GENE OF CLINICAL ISOLATES OF SALMONELLA-TYPHIMURIUM AND 3 OTHER SALMONELLA SPECIES LEADING TO DECREASED SUSCEPTIBILITIES TO 4-QUINOLONE DRUGS
Jc. Brown et al., MUTATIONS OF THE GYRA GENE OF CLINICAL ISOLATES OF SALMONELLA-TYPHIMURIUM AND 3 OTHER SALMONELLA SPECIES LEADING TO DECREASED SUSCEPTIBILITIES TO 4-QUINOLONE DRUGS, Journal of antimicrobial chemotherapy, 37(2), 1996, pp. 351-356
The region of the gyrA gene encoding nucleotides 72 to 557 in ten Salm
onella typhimurium clinical isolates received from Vellore, India and
six British clinical isolates of a number of Salmonella species has be
en sequenced. Those exhibiting a decreased susceptibility to 4-quinolo
ne drugs (MICs of ciprofloxacin ranging from 0.128 mg/L to 1.0 mg/L) h
ave been shown to possess a number of different mutations in this regi
on of the gene (Asp-87 to Gly, Asp-87 to Asn and Ser-83 to Phe). The m
utations Asp-87 to Gly and Ser-83 to Phe/Asp-87 to Asn have yet to be
reported occurring in S. typhimurium.