TABLE 4.
Phylogenetic distribution of virulence markers among poultry-source E. coli isolates
| Bacterial trait | Prevalence of trait by phylogenetic group, no. (%)
|
||||||
|---|---|---|---|---|---|---|---|
| ExPEC plus non-ExPEC (n = 52)
|
ExPEC only (n = 23)a
|
||||||
| A (n = 15) | B1 (n = 11) | B2 (n = 11) | D (n = 15) | A (n = 6) | B2 (n = 6) | D (n = 11) | |
| papCb | 7 (47) | 0(*)c | 1 (9) | 7 (47) | 6 (100)* | 1 (17) | 6 (55) |
| gafD | 6 (40)*** | 0 | 0 (0) | 0 (0) | 6 (100)*** | 0 (0) | 0(*) |
| bmaE | 6 (40)*** | 0 | 0 (0) | 0 (0) | 6 (100)*** | 0 (0) | 0(*) |
| fyuA | 9 (60)* | 0(**) | 6 (55) | 3 (20) | 6 (100)* | 6 (100)* | 2 (18)(***) |
| iutA | 11 (73) | 3 (27)(**) | 8 (73) | 14 (93)* | 6 (100) | 6 (100) | 11 (100) |
| ireA | 6 (40) | 0(*) | 1 (9) | 7 (47) | 6 (100)** | 0(**) | 5 (45) |
| kpsMT II | 0(**) | 0(*) | 6 (55)* | 8 (53)* | 0(***) | 7 (100)* | 8 (72) |
| K1 | 0 | 0 | 4 (36)* | 2 (13) | 0 | 4 (67)* | 2 (18) |
| ompT | 12 (80) | 2 (18)(**) | 7 (64) | 10 (67) | 6 (100) | 6 (100) | 7 (64)(*) |
| ibeA | 0 (0) | 0 | 5 (45)*** | 1 (7) | 0 | 5 (83)*** | 1 (9) |
| cvaC | 9 (60)** | 1 (9) | 3 (27) | 3 (20) | 6 (100)** | 2 (33) | 2 (18)(*) |
| traT | 7 (47)(*) | 8 (73) | 9 (82) | 13 (87) | 2 (33)(**) | 6 (100) | 10 (91) |
| malX | 0 (0) | 0 (0) | 5 (45)*** | 1 (7) | 0 | 5 (83)*** | 1 (9) |
a
Only groups A, B2, and D are shown (n = 24), since no B1 isolate was ExPEC.
b
Results for papEG, papG, and papG allele II approximated those for papC. Only those traits that yielded at least one association at the P < 0.05 level are included in the table.
c
P value symbols (for comparison of indicated group versus all others): ∗, P < 0.05; **, P ≤ 0.01; ***, P ≤ 0.001. (Parentheses indicated negative associations.)