an epidemiological study of listeriosis in dairy cattle

source
home made 38 182 0.6 (0.1-16.3) 0.8
purchased 0 6 0.0 (0.0-4.6) 0.5
outdoor feeding
fed 24 104 1.3 (0.6-2.7) 0.6
ad libitum 1 7 0.6 (0.0-5.4) 1.0
on the ground 0 1 0.0 (0.0-79.3) 0.3
in complete diet 7 37 0.8 (0.3-2.2) 0.7
in ring feeders 16 32 4.5 (1.6-13.0) 0.002*
in troughs 5 39 0.4 (0.1-1.4) 0.2
indoor feeding
fed 38 175 0.7 (0.2-3.4) 0.8
ad libitum 5 11 2.4 (0.7-8.3) 0.2
at the clamp face 2 11 0.9 (0.0-4.6) 0.8
on the floor 0 14 0.0 (0.0-1.8) 0.16
in complete diet 10 51 0.9 (0.4-2.2) 0.9
in ring feeders 23 46 4.9 (2.2-11.5)