From: Antimicrobial use policy change in pre-weaned dairy calves and its impact on antimicrobial resistance in commensal Escherichia coli: a cross sectional and ecological study
No. treatments
No. of calves
%
0
26
0.6
1
534
12.4
2
1119
26.0
3
1206
28.0
4
705
16.4
5
368
8.6
6
172
4.0
7
69
1.6
8
37
0.9
9
10–17