TABLE 2.
Phylogenetic distribution of selected virulence markers among 110 poultry-source E. coli isolates
| Bacterial trait | Total no. (% of 110) with trait | Prevalence of trait within phylogenetic group, no. (%)a
|
|||
|---|---|---|---|---|---|
| A (n = 35) | B1 (n = 30) | B2 (n = 14) | D (n = 31) | ||
| papA | 3 (3) | 1 (3) | 0 | 0 | 2 (6) |
| papC | 15 (14) | 7 (20) | 0 (**) | 1 (7) | 7 (23) |
| sfa/foc | 1 (1) | 0 | 0 | 1 (7) | 0 |
| iutA | 63 (57) | 14 (40)(**) | 10 (33)(**) | 9 (64) | 30 (97)*** |
| kpsMT II | 14 (13) | 0(*) | 0(**) | 6 (43)** | 8 (26) |
| ExPECb | 23 (21) | 6 (17) | 0(***) | 6 (43) | 11 (35)* |
a
P value symbols (for comparison of indicated group versus all others): ∗, P < 0.05; **, P ≤ 0.01; ***, P ≤ 0.001. (Parentheses around asterisk(s) indicate negative association.)
b
ExPEC, defined as presence of ≥2 of the following markers: papA and/or papC, afa/dra (none detected), sfa/foc, iutA, and kpsMT II.