CHARACTERIZATION OF GRLA, GRLB, GYRA, AND GYRB MUTATIONS IN 116 UNRELATED ISOLATES OF STAPHYLOCOCCUS-AUREUS AND EFFECTS OF MUTATIONS ON CIPROFLOXACIN MIC
Fj. Schmitz et al., CHARACTERIZATION OF GRLA, GRLB, GYRA, AND GYRB MUTATIONS IN 116 UNRELATED ISOLATES OF STAPHYLOCOCCUS-AUREUS AND EFFECTS OF MUTATIONS ON CIPROFLOXACIN MIC, Antimicrobial agents and chemotherapy, 42(5), 1998, pp. 1249-1252
One hundred sixteen unrelated clinical isolates of Staphylococcus aure
us (70 ciprofloxacin resistant and 46 ciprofloxacin susceptible) from
eight countries were studied for the presence of mutations in the grlA
, grlB, gyrA, and gyrB gene loci. Two mutations within grlA (located a
t codons 80 and 84) and two mutations within gyrA (located at codons 8
4 and 88) were clearly associated with ciprofloxacin resistance, altho
ugh other mutations detected within the four genes studied may also co
ntribute to decreased susceptibility.