Table 4 Prevalence and combination of virulence genes among 198 ESC-resistant Shigella isolates
Isolate | Serotype | No. (%) of isolates that produced the following: | No. (%) of isolates that contained the following combination of genes | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ial | ipaH | virA | set1A | set1B | sen | I | II | III | IV | V | ||
S. flexneri (n = 58) | 1a (n = 2) | 2 (3.4) | 2 (3.4) | 2 (3.4) | 0 (0.0) | 0 (0.0) | 2 (3.4) | 0 (0.0) | 2 (3.4) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
2a (n = 37) | 37(63.8) | 37 (63.8) | 37 (63.8) | 36 (62.1) | 36 (62.1) | 37 (63.8) | 0 (0.0) | 1 (1.7) | 0 (0.0) | 0 (0.0) | 36 (62.1) | |
2b (n = 2) | 2 (3.4) | 2 (3.4) | 2 (3.4) | 0 (0.0) | 0 (0.0) | 2 (3.4) | 0 (0.0) | 2(3.4) | 0 (0.0) | 0 (0.0) | 0 (0.0) | |
2c (n = 5) | 5 (8.6) | 5 (8.6) | 5 (8.6) | 0 (0.0) | 0 (0.0) | 5 (8.6) | 0 (0.0) | 5 (8.6) | 0 (0.0) | 0 (0.0) | 0 (0.0) | |
4c (n = 12) | 12(20.7) | 12 (20.7) | 12 (20.7) | 10 (17.2) | 10 (17.2) | 12 (20.7) | 0 (0.0) | 2 (3.4) | 0 (0.0) | 0 (0.0) | 10 (17.2) | |
| Â | 58 (100) | 58 (100) | 58 (100) | 46 (79.3) | 46 (79.3) | 58 (100) | 0 (0.0) | 12 (20.7) | 0 (0.0) | 0 (0.0) | 46 (79.3) | |
S. sonnei (n = 140) |  | 140(100) | 140(100) | 140(100) | 12 (8.6) | 19 (13.6) | 138(98.6) | 2 (1.4) | 114 (81.4) | 5 (3.6) | 12 (8.6) | 7 (5.0) |
S. flexneri vs S. sonnei (p value) | Â | NA | NA | NA | <0.001 | 0.003 | 0.360 | 0.364 | <0.001 | 0.603 | 0.021 | <0.001 |
Total | Â | 198(100) | 198(100) | 198(100) | 58 (29.3) | 65 (32.8) | 196 (99.0) | 2 (1.0) | 123(62.1) | 8 (4.0) | 12 (6.1) | 53 (26.8) |