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. 2017 Dec 22;146(4):442–449. doi: 10.1017/S0950268817002862

Table 1.

Laboratory STEC O157:H7 test results of clinical isolates and environmental samples collected from barn by collection date

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).