Volume 12, Number 4—April 2006
Research
Atypical Enteropathogenic Escherichia coli Infection and Prolonged Diarrhea in Children
Table 1
Classification of pathogenic Escherichia coli according to amplicon(s) generated by polymerase chain reaction (PCR) for virulence-associated determinants
| Interpretation† | Gene or virulence-associated determinant* |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| pCVD432 | aggA | bfpA | eae | ipaC | stIA | ltA | ehxA | stx1 | stx2 | Control strain (reference) | |
| EAEC‡ | + | + | – | – | – | – | – | – | – | – | O42 (13) |
| Typical EPEC | – | – | + | + | – | – | – | – | – | – | E2348/69 (14) |
| Atypical EPEC | – | – | – | + | – | – | – | – | – | – | E128012 (14) |
| EIEC | – | – | – | – | + | – | – | – | – | – | 223/83 (15) |
| ETEC‡ | – | – | – | – | – | + | + | – | – | – | H10407 (16) |
| EHEC§ | – | – | – | + | – | – | – | + | + | + | EDL933 (17) |
| STEC not EHEC¶ | – | – | – | – | – | – | – | – | + | + | |
*Factors specified by virulence genes: aggA, aggregative fimbria, AAF/I; bfpA, bundle-forming pilus; eae, intimin; ipaC, invasion plasmid antigen; stIA, heat-stable enterotoxin; ltA, heat-labile enterotoxin; ehxA, EHEC hemolysin; stx, Shiga toxin.
†EAEC, enteroaggregative E. coli; EPEC, enteropathogenic E. coli; EIEC, enteroinvasive E. coli; ETEC, enterotoxigenic E. coli; STEC, Shiga toxin–producing E. coli; EHEC, enterohemorrhagic E. coli.
‡Either positive by polymerase chain reaction.
§Either eae or ehxA, and either stx1 or stx2 positive.
¶Either stx1 or stx2 positive.
1Present address: An Giang General Hospital, Long Xuyen City, An Giang, Vietnam.
