From: Detection of pathogenic Escherichia coli on potentially contaminated beef carcasses using cassette PCR and conventional PCR
# of samples negative for O-antigens
# of samples positive for O-antigens
O26
O45
O103
O111
O121
O145
O157
Non-pathogenic samples (n = 24)
13
0
4
6
1
Pathogen+ samples (n = 18)
3
5
11