Table 3. Prevalence of virulence factor genes (VFGs) among the phylogenetic groups and the type of isolates according to their ampicillin resistance.
| Ampicillin Resistancee | ||||||
|---|---|---|---|---|---|---|
| Phylogenetic group | VECb isolates | Obstetric IECc isolates | ||||
| VFGsa | B2 | Othersd | AMP-S | AMP-R | AMP-S | AMP-R |
| (n = 75) | (n = 70) | (n = 31) | (n = 51) | (n = 44) | (n = 19) | |
| hlyA | 29 (39)** | 2 (3) | 1 (3) | 18 (35)** | 8 (18) | 4 (21) |
| cnf1 | 31 (41)** | 3 (4) | 1 (3) | 17 (33)** | 11 (25) | 5 (26) |
| sat1 | 27 (36) | 29 (41) | 11 (35.5) | 18 (35) | 16 (36) | 11 (58) |
| papa | 35 (47)** | 16 (23) | 7 (23) | 16 (31) | 16 (36) | 12 (63) |
| papEF | 24 (32) | 14 (20) | 3 (10) | 18 (35)** | 12 (27) | 6 (32) |
| papC | 30 (40)** | 14 (20) | 5 (16) | 15 (29) | 15 (34) | 9 (47) |
| focG | 12 (16)** | 1 (1) | 1 (3) | 8 (16) | 2 (4.5) | 2 (10.5) |
| Hra | 34 (45)** | 17 (24) | 5 (16) | 24 (47)** | 15 (34) | 7 (37) |
| fyuA | 71 (95)** | 43 (61) | 19 (61) | 47 (92)** | 33 (75) | 15 (79) |
| iutA | 34 (45) | 43 (61) | 12 (39) | 25 (49) | 28 (34) | 12 (63) |
| iroN | 33 (44)* | 19 (27) | 3 (10) | 26 (51)** | 17 (39) | 6 (32) |
| iucC | 34 (45) | 46 (66)* | 13 (42) | 28 (55) | 30 (68) | 9 (47) |
| ibeA | 14 (19)** | 1 (1) | 5 (16) | 8 (16) | 2 (4.5) | 0 |
aVFGs: Virulence Factor Genes
bVEC isolates: Vaginal Escherichia coli isolates
cObstetric IEC isolates: Obstetric Infection Escherichia coli isolates
dOthers: A, E, Non-typeable, F, C, B1, D and E clade 1
eAmpicillin resistance: AMP, ampicillin; S, Susceptible; R, Resistant.
*p-value<0.05,
**p-value≤0.01