Serological results obtained from 907 serum samples collected from unvaccinated cattle of
at least 6 months of age in the savannah-forest region of Ivory Coast were used to investigate
risk factors associated with bovine brucellosis seropositivity. Serum samples were tested
using the Rose Bengal test (RBT) and indirect enzyme linked immunosorbent assay (iELISA).
Using a parallel interpretation, RBT and iELISA results showed that 10.3% (95% confidence
interval (CI): 8.4, 12.4) of the cattle had antibodies against Brucella in our study area. The
logistic regression analysis indicated that brucellosis seropositivity was associated with
age and herd size. Cattle above 5 years of age were found to have a higher chance of being
seropositive (odd ratio (OR) = 2.8; 95% CI: 1.3, 6.4) compared to cattle under 3 years of age.
Similarly, the odd of brucellosis seropositivity for herds with more than 100 cattle was 3.3
(95% CI: 1.2, 8.9) times higher compared to those with less than 50 cattle.
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