From: Shiga toxin producing Escherichia coli: identification of non-O157:H7-Super-Shedding cows and related risk factors
consecutive stx-positive samples (monthly sampling)
no. of cows
% of cows
0
18
12.9%
1
57
40.7%
2-3
46
32.9%
4-5
17
12.1%
7-8
2
1.6%