TABLE 2.
Characteristics of stx-negative E. coli O157 isolatesa
| Strain designation | Serotype | DA or origin | Age (yr)b | Presence of free fecal Verotoxin | Fermentation of sorbitol | Growth on CT-SMAC | Presence of the following:
|
Anti-O157 LPS immunoblotting result | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
| E-hlyc | etp | katP | espP | ||||||||
| 19685 | O157:H7 | WD | 4 | − | − | + | + | + | + | + | ND |
| 2937 | O157:H− | WD | 3 | − | + | − | + | + | − | − | ND |
| 6790 | O157:H− | HUS | 6 | − | + | − | + | + | − | − | + |
| 431 | O157:H− | WD | 3 | − | + | − | + | + | − | − | ND |
| 659 | O157:H− | WD | 3 | − | + | − | + | + | − | − | ND |
| 2576 | O157:H− | HUSd | 1 | + | + | − | + | + | − | − | + |
a
Abbreviations: DA, disease association; WD, watery diarrhea; ND, not determined.
b
Age of patients.
c
All isolates were also enterohemolytic on blood agar plates.
d
STEC O103:H2 was found to be coisolate.