Table 4. Distribution of supplementary virulence genes (SVG) among Diarrheagenic E. coli (DEC) and non-DEC strains isolated from children with moderate to severe acute diarrhoea from Yucatan, Mexico.
| E. coli strains, N | Strains with SVG n (%) | Supplementary virulence genes n (%) | ||||
|---|---|---|---|---|---|---|
| DEC group, 824 | 297 (36) | aap | aatA | astA | Pet | cdt |
| EAEC, 223 | 208 (93) | 198 (89) | 183 (82) | 77 (34.5) | 10 (4.5) | 0 |
| tEPEC, 38 | 20 (53) | 0 (0) | 0 (0) | 11 (29) | 1 (3) | 9 (38) |
| aEPEC, 133 | 29 (22) | 0 (0) | 0 (0) | 13 (10) | 18 (13.5) | 2 (1.5) |
| ETEC, 84 | 26 (31) | 3 (3.5) | 0 (0) | 25 (30) | 0 (0) | 0 (0) |
| DAEC 346 | 14 (4) | 6 (2) | 0 (0) | 11 (3) | 0 (0) | 0 (0) |
| Non-DEC, 2260 | 589 (26) | 302 (13) | 30 (1.3) | 477 (21) | 30 (1.3) | 3 (0.6) |
ETEC: enterotoxigenic E. coli,
tEPEC: typical enteropathogenic E. coli,
aEPEC: atypical enteropathogenic E. coli,
EAEC: enteroaggregative E. coli,
DAEC: diffusely adherent E. coli.
aap and aatA: genes encoding for dispersin and its translocator,
astA, pet and cdt: genes encoding for enteroaggregative heat-stable toxin 1, plasmid encoded toxin and cytolethal distending toxin, respectively.