an epidemiological study of listeriosis in dairy cattle

source
home made 34 345 0.8 (0.3-2.1) 0.7
purchased 7 60 1.2 (0.5-2.95) 0.8
outdoor feeding
fed 26 223 1.3 (0.6-2.7) 0.6
ad libitum 0 9 0.0 (0.0-5.5) 0.6
on the ground 4 31 1.2 (0.3-4.0) 0.9
in complete diet 2 6 3.2 (0.4-19.1) 0.4
in ring feeders 19 111 2.98 (1.1-8.2) 0.02*
in troughs 3 32 0.8 (0.2-3.1) 0.9
in hay racks 4 65 0.5 (0.1-1.5) 0.25
off the field 1 13 0.7 (0.0-5.4) 0.9
indoor feeding
fed 33 336 0.8 (0.3-2.0) 0.7
ad libitum 0 7 0.0 (0.0-8.4) 0.8
on the floor 0 52 0.0 (0.0-0.85) 0.03*
in complete diet 1 10 1.0 (0.0-8.3) 0.6
in ring feeders 22 109 4.2 (1.8-9.6)