TABLE 4.
PCR detection of OI-57 adfO and ckf genes in E. coli strains belonging to different pathogroupsa
| E. coli pathogroup (no. of strains) | No. of strains with the PCR profile | PCR amplification ofb: |
|
|---|---|---|---|
| ORF Z2053c | ORF Z2054d | ||
| EPEC (42) | 30 | + | + |
| 12 | − | − | |
| EAEC (8) | 7 | − | − |
| 1 | + | + | |
| ETEC (9) | 9 | − | − |
| NTEC (8) | 8 | − | − |
| ECOR (27) | 27 | − | − |
a
The nomenclature of the ORFs refers to the sequence of STEC O157 strain EDL933 (GenBank accession no. AE005174).
b
+, amplified; −, not amplified.
c
adfO, encoding the intestinal colonization factor.
d
ckf, encoding the cell killing factor.