TABLE 3.
Prevalence of virulence markers according to Nal phenotype and ExPEC status among 52 poultry-derived E. coli isolates
| Bacterial traitb | Prevalence of trait, no. (%)
|
P valuec | |||
|---|---|---|---|---|---|
| Nal phenotypea
|
ExPEC status
|
||||
| Susceptible (n = 24) | Resistant (n = 38) | Not ExPEC (n = 29) | ExPEC (n = 23) | ||
| papA | 2 (8) | 1 (4) | 1 (3) | 2 (9) | |
| papCb | 6 (25) | 9 (32) | 2 (7) | 13 (57) | <.001 |
| sfa/foc | 1 (4) | 0 | 0 | 1 (4) | |
| sfaS | 1 (4) | 0 | 0 | 1 (4) | |
| gafD | 3 (13) | 3 (11) | 0 | 6 (26) | .005 |
| bmaE | 3 (13) | 3 (11) | 0 | 6 (26) | .005 |
| iha | 1 (4) | 0 | 1 (3) | 0 | |
| fimH | 24 (100) | 28 (100) | 29 (100) | 23 (100) | |
| fyuA | 7 (29) | 11 (39) | 4 (14) | 14 (61) | .001 |
| iutA | 16 (67) | 20 (71) | 13 (45) | 23 (100) | <.001 |
| iroN | 14 (58) | 20 (71) | 16 (55) | 18 (78) | |
| ireA | 8 (33) | 6 (21) | 3 (10) | 11 (49) | .004 |
| kpsMT II | 6 (25) | 8 (29) | 0 | 14 (61) | <.001 |
| K1 | 1 (4) | 5 (18) | 0 | 6 (26) | .005 |
| kpsMT III | 0 | 2 (7) | 2 (7) | 0 | |
| H7fliC | 0 | 3 (11) | 3 (10) | 0 | |
| ompT | 15 (63) | 16 (57) | 12 (41) | 19 (83) | .004 |
| ibeA | 2 (8) | 4 (14) | 0 | 6 (26) | .004 |
| cvaC | 9 (38) | 7 (25) | 6 (21) | 10 (43) | |
| traT | 15 (63) | 22 (79) | 29 (66) | 18 (78) | |
| iss | 14 (58) | 20 (71) | 16 (55) | 18 (78) | |
| malX | 2 (8) | 4 (14) | 0 | 6 (26) | .005 |
a
P > 0.10 for all comparisons, nalidixic acid susceptible versus resistant.
b
Results for papEG, papG, and papG allele II approximated those for papC. Not detected were afa/dra, focG, hlyD, cnf1, cdtB, and the K2 kpsMT II variant.
c
P values (by Fisher's exact test) for comparisons of non-ExPEC versus ExPEC shown only where values are <0.05.