Table 6.
Frequencies of STEC O157 tir(255A)/tir(255T) and stx2a/stx2c genotypes based on isolation source and LSPA6 lineage
| Genotype | Frequency (%) of genotype bya: |
|||||
|---|---|---|---|---|---|---|
| Isolation source |
Lineage |
|||||
| Bovine | Food | Human | LSPA6 I | LSPA6 I/II | LSPA6 II | |
| tir(255A) stx2a | 0 | 0 | 0 | 0 | 0 | 0 |
| tir(255A) stx2c | 53.4 | 37.9 | 4.7 | 0 | 0 | 80.3 |
| tir(255A) stx2astx2c | 2.7 | 0 | 2.4 | 0 | 0 | 6.1 |
| tir(255T) stx2a | 11.0 | 31.0 | 37.6 | 100 | 31.7 | 3.0 |
| tir(255T) stx2c | 31.5 | 24.1 | 32.9 | 0 | 51.0 | 10.6 |
| tir(255T) stx2astx2c | 1.4 | 6.9 | 22.4 | 0 | 17.3 | 0 |
a
Shown are the percentages of the total number of isolates in each group.