Table 3. Antibiotic resistance patterns of Enterobacteriaceae from chicken droppings in poultry farms at Gondar city, Northwest Ethiopia, March to June 2022.
| Class | Antibiotics | E. coli | Salmonella species | P. mirabilis | K. pneumoniae | E. cloacae | Total | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N = 87 | N = 23 | N = 18 | N = 11 | N = 4 | N = 143 | ||||||||
| S | R | S | R | S | R | S | R | S | R | S | R | ||
| N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | |||
| Aminoglycosides | GEN | 78 (89.7) | 9 (10.3) | 22 (95.7) | 1 (4.3) | 15 (83.3) | 3 (16.7) | 9 (81.8) | 2 (18.2) | 3 (75.0) | 1 (25.0) | 127 (88.8) | 16 (11.2) |
| Carbapenems | MER | 79 (90.8) | 8 (9.2) | 23 (100) | - | 15 (83.3) | 3 (16.7) | 9 (81.8) | 2 (18.2) | 4 (100) | - | 130 (90.9) | 13 (9.1) |
| Cephalosporins | CXT | 76 (87.4) | 11 (12.6) | 21 (91.3) | 2 (8.7) | 13 (72.2) | 5 (27.8) | 8 (72.7) | 3 (27.3) | 1 (25.0) | 3 (75.0) | 119 (83.2) | 24 (16.8) |
| CAZ | 72 (82.8) | 15 (17.2) | 18 (78.3) | 5 (21.7) | 14 (77.8) | 4 (22.2) | 7 (63.6) | 4 (36.4) | 1 (25.0) | 3 (75.0) | 112 (78.3) | 31 (21.7) | |
| CRO | 75 (86.2) | 12 (13.8) | 19 (82.6) | 4 (17.4) | 15 (83.3) | 3 (16.7) | 8 (72.7) | 3 (27.3) | 3 (75.0) | 1 (25.0) | 120 (83.9) | 23 (16.1) | |
| CTX | 72 (82.8) | 15 (17.2) | 18 (78.3) | 5 (21.7) | 14 (77.8) | 4 (22.2) | 7 (63.6) | 4 (36.4) | 1 (25.0) | 3 (75.0) | 112 (78.3) | 31 (21.7) | |
| Quinolones | NAL | 28 (32.2) | 59 (67.8) | 11 (47.8) | 12 (52.2) | 5 (27.8) | 13 (72.2) | 4 (36.4) | 7 (63.6) | 1 (25.0) | 3 (75.0) | 49 (34.3) | 94 (65.7) |
| CIP | 68 (78.2) | 19 (21.8) | 20 (87.0) | 3 (13.0) | 7 (38.9) | 11 (61.1) | 8 (72.7) | 3 (27.3) | 2 (50.0) | 2 (50.0) | 105 (73.4) | 38 (26.6) | |
| Penicillin | AMP | 7 (8.0) | 80 (92.0) | 5 (21.7) | 18 (78.3) | - | 18 (100) | - | 11 (100) | - | 4 (100) | 12 (8.4) | 131(91.6) |
| Phenicol | CHL | 62 (72.3) | 25 (28.7) | 21 (91.3) | 2 (8.7) | 10 (55.6) | 8 (44.5) | 6 (54.5) | 5 (45.5) | 3 (75.0) | 1 (25.0) | 102 (71.3) | 41 (28.7) |
| Sulfonamides (folate pathway inhibitors) | SXT | 32 (36.8) | 55 (63.2) | 9 (39.1) | 14 (60.9) | 5 (27.8) | 13 (72.2) | 2 (18.2) | 9 (81.8) | 1 (25.0 | 3 (75.0) | 49 (34.3) | 94 (65.7) |
| Tetracycline | TET | 8 (9.2) | 79 (90.8) | 4 (17.4) | 19 (82.6) | - | 18 (100) | 1 (9.1) | 10 (90.9) | - | 4 (100) | 13 (9.1) | 130 (90.9) |
Key: S = Sensitive, R = Resistance, AMP = ampicillin; TET = tetracycline; SXT = trimethoprim-sulfamethoxazole; NAL = nalidixic acid; CHL = chloramphenicol; CIP = ciprofloxacin; CAZ = ceftazidime; CTX = cefotaxime, CRO = ceftriaxone; CXT = cefoxitin; GEN = gentamicin; MER = meropenem