Table 2.
Resistance profiles for the E. coli isolates.
| Profile | No. Isolates (%) | ||||
|---|---|---|---|---|---|
| Box Bottoms | Feces | Boot Swabs | |||
| One-Day-Old (n = 68) | Pullets (n = 90) | Adults (n = 80) | Pullets (n = 80) | Adults (n = 65) | |
| AMP | - | 20 (22.2) | 4 (5.0) | 22 (27.5) | 6 (9.2) |
| NA | - | - | 1 (1.3) | 9 (11.3) | - |
| S | - | - | - | 1 (1.3) | - |
| TE | - | 13 (14.4) | 3 (3.8) | 1 (1.3) | 2 (3.1) |
| AMP/C | - | - | 1 (1.3) | - | 1 (1.5) |
| AMP/CTX | - | - | - | - | 1 (1.5) |
| AMP/CN | - | 2 (2.2) | - | - | - |
| AMP/NA | - | 1 (1.1) | 4 (5.0) | 3 (3.8) | 9 (13.9) |
| AMP/S | - | - | 8 (10.0) | 1 (1.3) | - |
| AMP/TE | 13 (19.1) | 35 (38.9) | 13 (16.3) | 5 (6.3) | 6 (9.2) |
| CN/TE | - | - | - | 1 (1.3) | - |
| NA/TE | - | 1 (1.1) | 1 (1.3) | - | - |
| S/TE | - | - | 1 (1.3) | - | 1 (1.5) |
| AMP/NA/CIP | - | - | 1 (1.3) | 1 (1.3) | - |
| AMP/CTX/CAZ | - | - | 1 (1.3) | 1 (1.3) | 1 (1.5) |
| AMP/CTX/S | 1 (1.5) | - | - | - | - |
| AMP/CTX/TE | 2 (2.9) | - | - | - | 1 (1.5) |
| AMP/C/CN | - | - | - | 2 (2.5) | - |
| AMP/CN/TE | 2 (2.9) | - | - | - | - |
| AMP/S/TE | 4 (5.9) | 7 (7.8) | 23 (28.8) | 1 (1.3) | 8 (12.3) |
| AMP/NA/TE | - | 7 (7.8) | 1 (1.3) | 1 (1.3) | 10 (15.4) |
| C/S/TE | - | - | - | - | 4 (6.2) |
| AMP/CTX/C/CN | - | - | - | 3 (3.8) | - |
| AMP/CTX/C/TE | - | - | 1 (1.3) | - | 1 (1.5) |
| AMP/CTX/CN/TE | 4 (5.9) | - | - | - | - |
| AMP/CTX/S/TE | 6 (8.8) | - | - | - | - |
| AMP/CN/S/TE | 21 (30.9) | - | - | - | - |
| AMP/NA/CIP/TE | - | - | 1 (1.3) | 1 (1.3) | 1 (1.5) |
| AMP/CTX/CAZ/C/TE | - | - | 1 (1.3) | - | - |
| AMP/CTX/CAZ/CN/TE | 2 (2.9) | - | - | - | - |
| AMP/CTX/CN/S/TE | 8 (11.8) | - | - | - | - |
| AMP/CTX/CAZ/S/TE | 3 (4.4) | - | - | - | - |
| AMP/CTX/CAZ/CN/S/TE | 2 (2.9) | - | - | - | - |
| AMP/C/CN/S/TE | - | - | - | 1 (1.3) | - |
AMP—ampicillin; CTX—cefotaxime; CAZ—ceftazidime; CIP—ciprofloxacin; NA—nalidixic acid; C—chloramphenicol; CN—gentamicin; S—streptomycin; TE—tetracycline.