an epidemiological study of listeriosis in dairy cattle

4) Silage eye cases:
Cases of Listeriosis in beef cattle: The presence of Listeriosis in beef cattle was
associated with an increased risk of reporting cases of silage eye (OR 35.5, CL 3.08-
409) (Table 4. 11).
Maize silage feeding: Feeding maize silage in ring feeders when animals were housed
(OR 4.37, CL 1.54-12.4) was associated with an increased risk of reporting silage eye
cases (Table 4. 11)
Use of straw bedding: Big bale straw bedding was negatively associated with reporting
silage eye cases (OR 0.18, CL 0.04-0.87) (Table 4. 11)
When herd size and herd size and cases of Listeriosis in beef cattle were
excluded from the model the same variables were still associated with disease (Table 4.
11).
Table 4. 11. The multivariate relationship between farming practices and cases of
Listeriosis with silage eye
Number of observations=176 OR 95% CL p value
cases of Listeriosis in beef cattle 35.5 3.08-409 0.004
ring feeder for maize silage
(indoor)
4.37 1.54-12.4 0.006
big bale straw bedding 0.18 0.08-0.87 0.034
OR adjusted odds ratio, 95% CL, 95% confidence limit.