Antimicrobial susceptibility and prevalence of N gonorrhoeae susceptible to each drug
| Antimicrobial agents | MIC50 (μg/ml) | MIC90 (μg/ml) | MIC range (μg/ml) | MIC range (μg/ml) of interpretive standard (No of isolates) | ||
|---|---|---|---|---|---|---|
| Sensitive* | Intermediate* | Resistant* | ||||
| *Sensitive, intermediate, and resistant are classified according to the NCCLS guidelines, 2002. | ||||||
| Penicillin G | 0.5 | 2 | <0.031–64 | ⩽0.06 (9/87) | 0.12–1 (61/87) | ⩾2 (17/87) |
| Tetracycline | 1 | 8 | <0.031–64 | ⩽0.25 (16/87) | 0.5–1 (34–87) | ⩾2 (17/87) |
| Cefixime | 0.125 | 0.5 | <0.004–0.5 | ⩽0.25 (79/87) | ⩾0.5 (8/87) | |
| Ceftriaxone | 0.016 | 0.063 | <0.004–0.063 | ⩽0.25 (87/87) | ⩾0.5 (0/87) | |
| Ciprofloxacin | 4 | >8 | <0.002->8 | ⩽0.06 (9/87) | 0.12–0.5 (18/87) | ⩾1 (60/87) |
| Levofloxacin | 4 | >8 | <0.002->8 | ⩽0.25 (24/87) | 0.15–1 (5/87) | ⩾2 (58/87) |
| Gatifloxacin | 1 | 4 | <0.002->8 | ⩽0.125 (19/87) | 0.25 (7/87) | ⩾0.5 (61/87) |
| Spectinomycin | 32 | 32 | <4–32 | ⩽32 (87/87) | 64 (0/87) | ⩾128 (0/87) |