Antibiotic class | Antimicrobial agent | Conc. (μg) | Zone diameter (mm) | S. Typhimurium (9) | S. Enteritidis (2) | S. Kentucky (1) | S. Paratyphi A (3) | Total Salmonella (15) | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
R | I | S | R | I | S | R | I | S | R | I | S | R | I | S | R | I | S | |||
Penicillin | Amoxycillin–clavulanic acid | 20 | ≤ 13 | 14–17 | ≥ 18 | 5 | 4 | – | – | 2 | – | 1 | – | – | 2 | 1 | – | 8 (53%) | 7 (47%) | – |
Ampicillin | 10 | ≤ 13 | 14–16 | ≥ 17 | 7 | 2 | – | 2 | – | – | 1 | – | – | 3 | – | – | 13 (87%) | 2 (13%) | – | |
Cephalosporin | Cefotaxime | 30 | ≤ 22 | 23–25 | ≥ 26 | 7 | 1 | 1 | 2 | – | – | – | 1 | – | 3 | – | – | 12 (80%) | 2 (13%) | 1 (7%) |
Cefpodoxime | 20 | ≤ 17 | 18–20 | ≥ 21 | 7 | 2 | – | 1 | 1 | – | – | 1 | – | 1 | 2 | – | 9 (60%) | 6 (40%) | – | |
Ceftazidime | 30 | ≤ 17 | 18–20 | ≥ 21 | 3 | 5 | 1 | – | 2 | – | – | 1 | – | 1 | 2 | – | 4 (26%) | 10 (67%) | 1 (7%) | |
Ceftriaxone | 30 | ≤ 19 | 20–22 | ≥ 23 | 3 | 6 | – | – | 2 | – | – | 1 | – | 2 | 1 | – | 5 (33%) | 10 (67%) | – | |
Miscellaneous | Chloramphenicol | 30 | ≤ 12 | 13–17 | ≥ 18 | – | 5 | 4 | – | – | 2 | – | 1 | – | – | 1 | 2 | – | 7 (47%) | 8 (53%) |
Colistin | 10 | ≤ 11 | 12–13 | ≥ 14 | – | – | 9 | – | – | 2 | – | – | 1 | – | – | 3 | – | – | 15 (100%) | |
Fluoroquinolone | Ciprofloxacin | 5 | ≤ 15 | 16–20 | ≥ 21 | – | 3 | 6 | – | 1 | 1 | – | 1 | – | – | – | 3 | – | 5 (33%) | 10 (67%) |
Enrofloxacin | 5 | ≤ 17 | 18–20 | ≥ 21 | 1 | 7 | 1 | – | 1 | 1 | – | 1 | – | – | 2 | 1 | 1 (7%) | 11 (73%) | 3 (20%) | |
Nalidixic acid | 30 | ≤ 13 | 14–18 | ≥ 19 | 3 | 6 | – | 1 | 1 | – | 1 | – | – | – | 3 | – | 5 (33%) | 10 (67%) | – | |
Aminoglycoside | Streptomycin | 10 | ≤ 11 | 12–14 | ≥ 15 | 2 | 7 | – | 1 | 1 | – | 1 | – | – | – | 2 | 1 | 4 (26%) | 10 (67%) | 1 (7%) |
Tetracycline | Tetracycline | 30 | ≤ 11 | 12–14 | ≥ 15 | 3 | 6 | – | 2 | – | – | 1 | – | – | – | 3 | – | 6 (40%) | 9 (60%) | – |
Sulphonamide | Trimethoprim/sulphamethoxazole | 25 | ≤ 4 | 3 | ≥ 2 | 4 | 2 | 3 | 1 | 1 | – | 1 | – | – | 2 | 1 | – | 8 (53%) | 4 (26%) | 3 (20%) |