TABLE 3.
Frequency of virulence-associated genes by phenotype (AIEC or non-AIEC) and origin (extraintestinal or intestinal)a
| Virulence gene | No. (%) of strains |
P | No. (%) of strains |
P | ||
|---|---|---|---|---|---|---|
| Non-AIEC (n = 59) | AIEC (n = 27) | Extraintestinal (n = 63) | Intestinal (n = 23) | |||
| papC | 25 (42.4) | 14 (51.9) | NS | 27 (42.9) | 12 (52.2) | NS |
| papGIb | 1 (4.0) | 0 | NS | 1 (3.7) | 0 | NS |
| papGII | 6 (24) | 3 (21.4) | NS | 7 (25.9) | 2 (16.7) | NS |
| papGIII | 11 (44) | 4 (28.6) | NS | 11 (40.7) | 4 (33.3) | NS |
| papGI-II | 2 (8.0) | 0 | NS | 2 (7.4) | 0 | NS |
| papGII-III | 2 (8.0) | 0 | NS | 2 (7.4) | 0 | NS |
| sfa-focDE | 27 (45.8) | 6 (22.2) | 0.031 | 29 (46.0) | 4 (17.4) | 0.013 |
| afa-draBC | 5 (8.5) | 4 (14.8) | NS | 6 (9.5) | 3 (13.0) | NS |
| fimH | 54 (91.5) | 27 (100.0) | NS | 58 (92.1) | 23 (100.0) | NS |
| fimAvMT78 | 16 (27.1) | 6 (22.2) | NS | 17 (27.0) | 5 (21.7) | NS |
| neuC | 15 (25.4) | 3 (11.1) | NS | 15 (23.8) | 3 (13.0) | NS |
| iucD | 39 (66.1) | 15 (55.6) | NS | 42 (66.7) | 12 (52.2) | NS |
| ibeA | 19 (32.2) | 5 (18.5) | NS | 20 (31.7) | 4 (17.4) | NS |
| hlyA | 25 (42.4) | 8 (29.6) | NS | 27 (42.9) | 6 (26.1) | NS |
| cnf1 | 21 (35.6) | 8 (29.6) | NS | 23 (36.5) | 6 (26.1) | NS |
a
AIEC includes intestinal and extraintestinal AIEC strains; non-AIEC includes only ExPEC strains. Extraintestinal includes AIEC and non-AIEC ExPEC strains; intestinal includes only intestinal AIEC strains. NS, not significant.
b
For papG alleles, percentages are calculated with respect to papC-positive strains.