Table 3.
Characterization of E. coli O157 isolates by O157 clade type and stx bacteriophage insertion site
| Country | Clade | No. of isolates | SBIa |
||
|---|---|---|---|---|---|
| stx1 | stx2 | stx2c | |||
| Argentina | 3 | 1 | yehV | ||
| 2 | yehV | wrbA | |||
| 4 | 2 | Unk | |||
| 3 | Unk | ||||
| 6 | Unk | sbcB | |||
| 5 | sbcB | ||||
| 1 | Unk | sbcB | |||
| 1 | argW | sbcB | |||
| 8 | 3 | sbcB | |||
| 6 | Unk | argW | sbcB | ||
| 6 | argW | ||||
| 24 | argW | sbcB | |||
| Australia | 2 | 1 | yehV | wrbA | |
| 3 | 1 | yehV | wrbA | ||
| 6 | 1 | sbcB | |||
| 8 | argW | sbcB | |||
| 7 | 3 | argW | |||
| 1 | argW | Unk | |||
| 28 | argW | sbcB | |||
| 16 | sbcB | ||||
| 8 | 1 | argW | sbcB | ||
a
SBI, Shiga toxin bacteriophage insertion locus; Unk, unknown. The SBI for some stx prophages of O157 isolates remain unknown. In such cases, stx lysogens were not isolated and SBI mapping did not correlate with stx genotype data for any of the five Shiga toxin prophage loci examined.