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stx genotype of STEC O157 strains isolated between 1993 and 1996 from humans in Argentina, Australia and New Zealand.
| No. (%) of strains from: | |||
| stx genotype | Argentina | Australia | New Zealand |
| stx1 | 0 | 2 (10) | 0 |
| stx2 | 3 (9) | 3 (15) | 16 (89) |
| stx2c (vh-a) | 0 | 1 (5) | 2 (11) |
| stx1/stx2 | 0 | 6 (30) | 0 |
| stx1/stx2c (vh-a) | 0 | 4 (20) | 0 |
| stx1/stx2-UT | 0 | 1 (5) | 0 |
| stx2/stx2c (vh-a) | 32 (91) | 3 (15) | 0 |
| Total | 35 (100) | 20 (100) | 18 (100) |
