TABLE 5.
Distribution of antibiotic resistance genes among the 256 E. coli isolates
| Antibacterial | Gene(s) | No. (%) of isolates |
|||
|---|---|---|---|---|---|
| “Other” ExPEC (n = 15) | APEC (n = 44) | Commensal (n = 197) | Total (n = 256) | ||
| Aminoglycoside (streptomycin) | ant(3)-Ia (aadA1) | 0 (0.0) | 6 (13.6) | 50 (25.4) | 56 (21.9) |
| Trimethoprim | dhfrI | 0 (0.0) | 6 (13.6) | 1 (0.5) | 7 (2.7) |
| Phenicol | floR | 15 (100.0) | 2 (4.5) | 46 (23.4) | 63 (24.6) |
| Class I integron | int1(1) + int1(2) + int1(3) | 0 (0.0) | 0 (0.0) | 50 (25.4) | 50 (19.3) |
| Sulfonamide | sulI | 0 (0.0) | 0 (0.0) | 4 (2.0) | 4 (1.7) |
| sulII | 15 (100.0) | 8 (18.2) | 5 (2.5) | 28 (10.9) | |
| sulI + sulII | 0 (0.0) | 0 (0.0) | 45 (22.8) | 45 (17.6) | |
| β-Lactam (ampicillin) | blaTEM | 0 (0.0) | 3 (6.8) | 47 (23.9) | 50 (19.3) |
| blaSHV | 0 (0.0) | 0 (0.0) | 13 (6.6) | 13 (5.0) | |
| blaTEM + blaSHV | 0 (0.0) | 0 (0.0) | 2 (1.0) | 2 (0.8) | |
| Tetracyclinea | tet(A) | 13 (86.7) | 2 (4.5) | 85 (43.1) | 100 (39.0) |
| tet(B) | 0 (0.0) | 35 (79.5) | 43 (21.8) | 78 (30.5) | |
| tet(A) + tet(B) | 0 (0.0) | 1 (2.3) | 26 (13.2) | 27 (10.5) | |
| tet(A) + tet(C) | 2 (13.3) | 0 (0.0) | 6 (3.0) | 8 (3.1) | |
| tet(A) + tet(B) + tet(C) | 0 (0.0) | 0 (0.0) | 8 (4.1) | 8 (3.1) | |
a
None of the isolates were positive for tet(C) alone or for the tet(B)-tet(C) combination.