Table 5 Antibiotic resistance profile of Salmonella spp. isolates (n = 21) from bovine milk samples.
From: High prevalence of antibiotic resistance in pathogenic foodborne bacteria isolated from bovine milk
Antimicrobial agent | Disk content | Interpretive categories and zone diameter breakpoints (nearest whole mm)* | No. of isolates (%) | ||||
|---|---|---|---|---|---|---|---|
R** | I | S | R | I | S | ||
Azithromycin | 15 μg | ≤ 12 | – | ≥ 13 | 8 (38.09) | – | 13 (61.90) |
Chloramphenicol | 30 μg | ≤ 12 | 13–17 | ≥ 18 | 6 (28.57) | 1 (4.76) | 14 (66.66) |
Ceftriaxone | 30 μg | ≤ 19 | 20–22 | ≥ 23 | 5 (23.80) | 3 (14.28) | 13 (61.90) |
Penicillin | 10 IU | ≤ 14 | – | ≥ 15 | 21 (100) | – | 0 (0) |
Gentamicin | 10 μg | ≤ 12 | 13–14 | ≥ 15 | 0 (0) | 0 (0) | 21 (100) |
Amoxicillin | 25 μg | ≤ 13 | 14–16 | ≥ 17 | 15 (71.42) | 3 (14.28) | 3 (14.28) |
Tetracycline | 30 μg | ≤ 11 | 12–14 | ≥ 15 | 5 (23.80) | 7 (33.33) | 9 (42.85) |
Cephalexin | 30 μg | ≤ 14 | – | ≥ 15 | 21 (100) | – | 0 (0) |
