Table 2.
Distribution of Gram-negative bacteria with resistance to antibiotics at the sampling sites during the dry and wet seasons.
| Sampling site | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Antibiotic | A | B | C | D | E | Total | ||||||
| DS (%) | WS (%) | DS (%) | WS (%) | DS (%) | WS (%) | DS (%) | WS (%) | DS (%) | WS (%) | DS (%) | WS (%) | |
| FOX | 26.7 | 21.7 | 13.3 | 18.8∗ | 26.7 | 42∗ | 15 | 4.3 | 18.3∗ | 13 | 73.2 | 78.4 |
| CTX | 26.7 | 31.3 | 13.3 | 0 | 26.7 | 50 | 15 | 9.4 | 18.3∗ | 9.0 | 73.2 | 36.4 |
| CAZ | 22.4 | 26 | 16.3 | 10 | 24.5 | 50 | 20.4 | 4 | 16.3∗ | 10 | 59.8 | 56.8 |
| TZP | 28.8 | 14.6 | 11.9 | 3.6 | 25.4 | 50 | 13.6∗ | 3.6 | 20.3 | 28.6 | 72 | 31.8 |
| MEM | 26.8 | 26.1 | 12.2 | 15.9 | 26.8 | 42 | 19.5 | 2.9 | 14.6 | 13 | 50 | 78.4 |
| STX | 28.6 | 32.4 | 17.9 | 11.8 | 21.4 | 41.2 | 17.9 | 5.9 | 14.3 | 8.8 | 68.3 | 38.6 |
| CIP | 25.6 | 30.4 | 16.3 | 17.9 | 23.3 | 37.5 | 16.3 | 5.4 | 18.6∗ | 8.9 | 52.4 | 63.3 |
| GEN | 31.6 | 26.9 | 14 | 11.5 | 26.3 | 38.5 | 14 | 0 | 14 | 23.1 | 69.5 | 29.5 |
Trimetroprim/sulfametoxazol (SXT), gentamicin (GEN), ciprofloxacin (CIP), ceftazidime (CAZ), cefoxitin (FOX), cefotaxime (CTX), meropenem (MEM), piperacillin/tazobactam (TZP); wastewater treatment plant (A), rainwater channel (B), Intersector Canal (CVC) Sur (C), water treatment plant “Puerto Mallarino” (D), and Melendez River (E). DS: dry season, WS: wet season. ∗p < 0.05.