Table 1.
Pooled sample area/items | April 30 6 days after event |
May 13 19 days after event |
||
---|---|---|---|---|
STEC O157:H7 test results | PFGE pattern combination | STEC O157:H7 test results | PFGE pattern combination | |
Bleachers, circle of farming | STEC O157:H7 isolated | A, D | STEC O157:H7 isolated | A, E |
Hay maze area | STEC O157:H7 isolated | A | STEC O157:H7 isolated | A |
Bleachers, northeast | – | STEC O157:H7 isolated | A | |
Manure bunker | – | STEC O157:H7 isolated | A | |
Calves health area | No STEC O157:H7 isolated | No STEC O157:H7 isolated | ||
Milking parlour area | No STEC O157:H7 isolated | No STEC O157:H7 isolated | ||
Benches, dairy products | No STEC O157:H7 isolated | No STEC O157:H7 isolated | ||
Goody bag area | No STEC O157:H7 isolated | – | ||
Work gloves | – | No STEC O157:H7 isolated | ||
Sawdust | – | No STEC O157:H7 isolated | ||
Clinical isolates (stool) | STEC O157:H7 isolated | A, B, C |
Bold text indicates isolates with PFGE patterns indistinguishable from that of the outbreak strain of STEC O157:H7. Five PFGE pattern combinations were identified from clinical and environmental sources: EXHX01.0047/EXHA26.0071 (pattern A: 21 clinical isolates, nine environmental isolates), EXHX01.2401/EXHA26.0071 (pattern B: two clinical isolates), EXHX01.5960/EXHA26.0071 (pattern C: one clinical isolate), EXHX01.0047/EXHA26.4214 (pattern D: one environmental isolate) and EXHX01.0047/EXHA26.4219 (pattern E: one environmental isolate).