TABLE 2.

Comparison of susceptibilities of RGM to gatifloxacin and ciprofloxacin at specified MICs

Species and drugNo. of isolates testedaNo. (cumulative %) of isolates susceptible at an MIC (μg/ml) of:
≤0.12b≤0.25a0.5124816>1632>32
M. abscessus 24
    Gatifloxacin1 (4)2 (13)2 (21)4 (38)6 (63)6 (88)3 (100)
    Ciprofloxacin3 (12)1 (15)3 (27)3 (38)16 (100)
M. chelonae 32
    Gatifloxacin1 (3)2 (9)10 (41)12 (78)6 (97)1 (100)
    Ciprofloxacin1 (3)1 (6)17 (59)6 (78)3 (88)4 (100)
M. fortuitum group39
    Gatifloxacin38 (97)1 (100)
    Ciprofloxacin13 (33)11 (62)8 (82)4 (92)3 (100)
M. mucogenicum 20
    Gatifloxacin8 (40)10 (90)2 (100)
    Ciprofloxacin1 (5)7 (40)11 (95)1 (100)
  • a A total of 115 isolates were tested.

  • b The two lowest MICs reflect different lot numbers of panels used.