Table 3.
Number of antibiotics to which the strains with/without integrons showed resistance.
| Presence of integrons | Intact/truncated integron and pathotype | No. of strains | Number (%) of antibiotics to which each strain showed resistance† | ||||||
|---|---|---|---|---|---|---|---|---|---|
| None | One | Two | Three | Four | Five | Six | |||
| Strains with integrons | Intact integron | ||||||||
| EAEC∗ | 11 | 0 | 1 | 0 | 0 | 5 | 3 | 2 | |
| EPEC∗ | 2 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | |
| STEC∗ | 2 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | |
| ETEC∗ | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Subtotal | 15 | 1 (7%) | 2 (13%) | 0 | 0 | 6 (40%) | 3 (20%) | 3 (20%) | |
| Truncated integron | |||||||||
| EAEC | 9 | 0 | 0 | 0 | 1 | 2 | 5 | 1 | |
| EPEC | 3 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | |
| STEC | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| ETEC | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Subtotal | 12 | 0 | 0 | 0 | 2 (16.7) | 3 (25.0) | 6 (50.0) | 1 (8.3) | |
| Strains without integrons | EAEC | 20 | 6 | 6 | 5 | 1 | 1 | 1 | 0 |
| EPEC | 32 | 25 | 2 | 2 | 1 | 1 | 0 | 1 | |
| STEC | 81 | 66 | 6 | 7 | 1 | 1 | 0 | 0 | |
| ETEC | 2 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | |
| Subtotal | 135 | 97 (71.6) | 15 (11.1) | 14 (10.4) | 3 (2.2) | 3 (2.2) | 2 (1.5) | 1 (0.7) | |
|
| |||||||||
| Total | 162 | 98 (60.5) | 17 (10.5) | 14 (8.6) | 5 (3.1) | 12 (7.4) | 11 (6.8) | 5 (3.1) | |
†A total of 14 antimicrobials were tested (ampicillin, sulfamethoxazole-trimethoprim, tetracycline, nalidixic acid, streptomycin, chloramphenicol, gentamicin, cefotaxime, norfloxacin, kanamycin, ciprofloxacin, fosfomycin, imipenem, and meropenem).