TABLE 3.

Numbers of animals by ordered category of E. coli O157 carriage in each lot

LotNo. of animals in bacterial carriage categoriesa
NegativeLow levelHigh levelTotal
11010
29110
372110
49110
51010
68210
79110
81010
99110
101010
111212
121212
131212
1417311
1583112
161212
171212
1837212
1992112
201212
211212
221212
231212
241212
Total2322510267
  • a Negative, negative as determined by all tests; low level, positive as determined only by IMS or by bacterial levels of <103 CFU ml−1 or <103 CFU g−1 for all samples; high level, bacterial levels of ≥103 CFU ml−1 or ≥103 CFU g−1 at either tissue site or in either fecal sample.