Table 1. Distribution of phylogenetic group, sequence type (ST), and ESBL genotype in clinical isolates and isolates from water environments.
| Clinical isolates | Environmental isolates |
p-value Clinical vs environmental isolates |
p-value Environmental isolates | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Total n = 45, (%) |
Feb–May n = 26, (%) |
June–Sept n = 19, (%) |
Total n = 82, (%) |
June n = 36, (%) |
October n = 46, (%) |
Total vs total |
Feb–May vs June |
June–Sept vs October |
June vs October |
|
| Phylogenetic group | ||||||||||
| A | 6 (13.3) | 4 (15.4) | 2 (10.5) | 23 (28.0) | 2 (5.6) | 21 (45.7) | ns | ns | <0.01 | <0.01 |
| B1 | 5 (11.1) | 2 (7.7) | 3 (15.8) | 20 (24.4) | 16 (44.4) | 4 (8.7) | ns | <0.01 | ns | <0.01 |
| B2 | 20 (44.4) | 14 (53.8) | 6 (31.6) | 14 (17.1) | 4 (11.1) | 10 (21.7) | <0.01 | <0.01 | ns | ns |
| D | 14 (31.1) | 6 (23.1) | 8 (42.1) | 25 (30.5) | 14 (38.9) | 11 (23.9) | ns | ns | ns | ns |
| Sequence type | ||||||||||
| ST131 | 15 (33.3) | 11 (42.3) | 4 (21.1) | 11 (13.4) | 3 (8.3) | 8 (17.4) | <0.01 | <0.01 | ns | ns |
| ST38 | 6 (13.3) | 2 (7.7) | 4 (21.1) | 12 (14.6) | 5 (13.9) | 7 (15.2) | ns | ns | ns | ns |
| Other | 24 (53.3) | 13 (50.0) | 11 (57.8) | 59 (72.0) | 28 (77.8) | 31 (67.4) | <0.05 | <0.05 | ns | ns |
| ESBL genotype | ||||||||||
| CTX-M-15 | 28 (62.2) | 19 (73.1) | 9 (47.4) | 51 (62.2) | 20 (55.6) | 31 (67.4) | ns | ns | ns | ns |
| CTX-M-14 | 3(6.7) | 2 (7.7) | 1 (5.3) | 10 (12.2) | 4 (11.1) | 6 (13.0) | ns | ns | ns | ns |
| CTX-M-27 | 3 (6.7) | 1 (3.8) | 2 (10.5) | 7 (8.5) | 3 (8.3) | 4 (8.7) | ns | ns | ns | ns |
| Other | 11 (24.4) | 4 (15.4) | 7 (36.8) | 14 (17.1) | 9 (25.0) | 5 (10.9) | ns | ns | <0.05 | ns |
ns = not significant (p > 0.05)