TABLE 1.
E. coli strains used in this study
| Strain | Serotype | Sourcea | Characteristicb
|
|||
|---|---|---|---|---|---|---|
| eae | stx1 | stx2 | ehxA | |||
| 94CR | O48:H21 | HUS | − | + | + | + |
| 95HE4 | O91:H7 | Diarrhea | − | + | − | + |
| 95NR1 | O111:H− | HUS | + | + | + | + |
| 95SF2 | O157:H− | HUS | + | − | + | + |
| 95ZG1 | O26:H? | Diarrhea | + | + | − | + |
| 97MW1 | O113:H21 | Bloody diarrhea, MHA-T | − | − | + | + |
| 98NK2 | O113:H21 | HUS | − | − | + | + |
| 98NK2-Cu | O113:H21 | Plasmid-cured 98NK2 | − | − | + | − |
| B2F1 | O91:H21 | HUS | − | − | + | + |
| EDL933 | O157:H7 | Bloody diarrhea | + | + | + | + |
| EDL933-Cu | O157:H7 | Plasmid-cured EDL933 | + | + | + | − |
| EPEC 87A | O111:H? | Diarrhea | + | − | − | − |
a
STEC strains were originally isolated from the feces of patients with diarrhea, bloody diarrhea, HUS, or microangiopathic haemolytic anemia and thrombocytopenia (MHA-T).
b
Determined by multiplex PCR (24); eae and ehxA are markers for the LEE pathogenicity island and the large STEC virulence plasmid, respectively.