TABLE 5.
Distribution of genes encoding VFs among RAPD and ECOR groupsa
| VF gene | No. of genes in ECOR groupb:
|
Pc | No. of genes in RAPD groupb:
|
Pd | No. of genes in other strainsb (n = 8) | ||||
|---|---|---|---|---|---|---|---|---|---|
| A (n = 12) | B1 (n = 7) | B2 (n = 71) | D (n = 15) | I (n = 61) | II (n = 36) | ||||
| neuC | 4 (33) | 2 (29) | 46 (65) | 6 (40) | 0.0045 | 37 (61) | 14 (39) | 0.04 | 7 (87) |
| hly | 0 | 0 | 38 (53) | 0 | <0.0001 | 27 (44) | 8 (22) | 0.03 | 3 (37) |
| fimH | 7 (58) | 6 (86) | 60 (84) | 11 (73) | NSe | 54 (88) | 23 (64) | 0.004 | 7 (87) |
| iucC | 5 (42) | 2 (29) | 43 (61) | 9 (60) | NS | 41 (67) | 14 (39) | 0.007 | 4 (50) |
| papC | 1 (8) | 0 | 19 (27) | 2 (13) | 0.033 | 16 (26) | 3 (8) | 0.03 | 3 (37) |
| afa | 2 (17) | 0 | 1 (1) | 0 | NS | 0 | 2 (6) | NS | 1 (12) |
| sfa/foc | 1 (8) | 0 | 34 (48) | 0 | <0.0001 | 26 (43) | 7 (19) | 0.018 | 2 (25) |
| ibeA | 1 (8) | 0 | 15 (21) | 1 (7) | 0.046 | 15 (25) | 1 (3) | 0.005 | 1 (12) |
| Median (range) | 2 (0-4) | 1 (0-3) | 4 (1-6) | 2 (0-4) | 4 (0-6) | 2 (0-4) | 3.5 (2-6) | ||
a
K1 capsule antigen (neuC), alpha-hemolysin (hly), type 1 pili (fimH), aerobactin (iucC), type P pili (papC), afimbrial adhesin (afa), type S pili and F1C fimbriae (sfa/foc), and IbeA protein (ibeA).
b
Number (percent) of strains positive for the virulence gene as demonstrated by a PCR assay.
c
ECOR group B2 versus all other ECOR groups.
d
RAPD group I versus RAPD group II.
e
NS, not significant.