Table 2.
Azithromycin resistance pattern by disc diffusion disc diameter, MIC and presence of gene mphA.
| AZM disc diffusion zone diameter (mm) | Total no. of isolates | AZM MIC (Ranges in µg/ml) | S. flexneri | S. sonnei | S. boydii | S. dysenteriae | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of isolates | MIC (µg/ml) | mphA | No. of isolates | MIC (µg/ml) | mphA | No. of isolates | MIC (µg/ml) | mphA | No. of isolates | MIC (µg/ml) | mphA | |||
|
7 8 9 10 11 12 13 14 15 ≥ 16 |
28 2 0 1 3 7 13 19 3 25 |
64–256 32–64 64 4–32 4–16 1–16 1–16 2–4 1–2 |
8 1 0 0 2 1 1 1 0 18 |
64–256 32 16–32 16 16 16 1–2 |
( +)ve ( +)ve ( +)ve (+)ve (−)ve (−)ve ND |
16 0 0 0 1 6 12 18 3 3 |
64–256 32 4–8 2–8 2–8 2–4 4 |
( +)ve ( +)ve (-)ve ND ND ND ND |
3 1 0 0 0 0 0 0 0 5 |
64–256 64 1 |
( +)ve ( +)ve |
1 0 0 1 0 0 0 0 0 0 |
256 64 |
( +)ve ( +)ve |
ND not done.