Table 2. Genes of resistance detected among commensal E. coli strains with and without integrons.
| Antibiotics | Integron-positive strains (n = 40) | Integron-negative strains (n = 110) | ||
| number | Genes detected (no. of strains) | number | Genes detected (no. of strains) | |
| ampicillin | 27 | blaTEM (12) | 45 | blaTEM (15) |
| blaOXA-1 (1) | ||||
| tetracycline | 31 | tetA (5) | 46 | tetA (10) |
| tetB (5) | tetB (7) | |||
| tetA+tetB (1) | ||||
| sulponamide | 27 | sul-1 (3) | 24 | sul-1 (7) |
| sul-2 (1) | sul-1+ sul-2 (5) | |||
| sul-1+ sul-2 (8) | ||||
| sul-2+ sul-3 (1) | ||||
| nalidixic acid | 29 | qnrS (1) | 55 | NDa |
| streptomycin | 33 | aadA (8) | 61 | NDa |
| kanamycin | 19 | aphA1 (7) | 31 | aphA1 (1) |
| chloramphenicol | 13 | cmlA1 (6) | 4 | cmlA1 (2) |
| floR (2) | floR (1) | |||
a ND, no gene detected.