TABLE 1.
Presence of defined EAEC virulence factors in EAEC and HEp-2 cell-nonadherent E. coli strains isolated from diarrheal stools of patients with traveler's diarrhea
| Virulence factor | No. (%) of patients with:
|
P | |
|---|---|---|---|
| HEp-2- adherent E. coli (n = 86) | HEp-2- nonadherent E. coli (n = 90) | ||
| Patients with only one virulence factor | 30 (35) | 5 (6) | <0.001 |
| aggA only | 13 | 0 | |
| aggR only | 11 | 2 | |
| aspU only | 5 | 2 | |
| aafA only | 1 | 1 | |
| Patients with more than one virulence factors | 30 (35) | 2 (2) | <0.003 |
| aggA and aggR | 2 | 0 | |
| aggA and aspU | 3 | 0 | |
| aggA and aafA | 2 | 0 | |
| aggA and aggR and aspU | 8 | 0 | |
| aggR and aspU | 9 | 2 | |
| aggR and aafA | 3 | 0 | |
| aggR and aspU and aafA | 3 | 0 | |
| Patients with one or more virulence factors | 60 (70) | 7 (8) | <0.001 |
| aggA or aggA with other virulence factors | 28 | 0 | |
| aggR or aggR with other virulence factors | 36 | 2 | |
| aspU or aspU with other virulence factors | 28 | 4 | |
| aafA or aafA with other virulence factors | 9 | 1 | |
| Patients negative for virulence factors | 26 (30) | 83 (92) | <0.01 |