1. A study on seroprevalence of caprine brucellosis under three livestock production systems in southern and central Ethiopia.
- Author
-
Asmare K, Megersa B, Denbarga Y, Abebe G, Taye A, Bekele J, Bekele T, Gelaye E, Zewdu E, Agonafir A, Ayelet G, and Skjerve E
- Subjects
- Age Factors, Agglutination Tests veterinary, Animal Husbandry, Animals, Brucellosis blood, Brucellosis epidemiology, Brucellosis microbiology, Cross-Sectional Studies, Ethiopia epidemiology, Female, Goat Diseases blood, Goats, Logistic Models, Male, Multivariate Analysis, Prevalence, Risk Factors, Rose Bengal chemistry, Seroepidemiologic Studies, Antibodies, Bacterial blood, Brucella isolation & purification, Brucellosis veterinary, Goat Diseases epidemiology, Goat Diseases microbiology
- Abstract
Caprine brucellosis in Ethiopia is less commonly reported with limited information on the disease status in the country. The objective of this study was therefore to highlight the status of goat brucellosis in three distinctly different livestock production systems of southern and central Ethiopia. A total 3,315 goats of different age and sex, living with other animals in variable flock size, were sampled from 448 flocks raised in sedentary, pastoral and agro-pastoral production systems. Goats were bled aseptically and sera were collected for serial testing using Rose Bengal Plate Test as screening test and subsequently complement fixation test as confirmatory test. Questionnaire and laboratory data were analysed for descriptive, univariable and multivariable logistic regression analysis both at individual and flock level (STATA 11). The study revealed an overall animal level seroprevalence of 1.9 % (95 % CI 1.5, 2.4). In sedentary production system, the observed seroprevalence was 0.6 % (95 % CI 0.2, 0.9) while 1.9 % (95 % CI 1.1, 2.7) and 7.6 % (95 % CI 5.1, 10.1) were the proportion of seroreactors for agro-pastoral and pastoral production systems, respectively. The observed prevalence difference between the three production systems was statistically significant (P < 0.05). At the flock level analysis, 11.2 % (95 % CI 8.2, 14.1) of the flocks sampled had at least one seropositive goat among themselves. Like individual level analysis, the highest prevalence of 32.5 % (95 % CI 21.9, 43.0) was recorded for pastoral production system, followed by agro-pastoral, 13.0 % (95 % CI 7.0, 19.0) and sedentary production system, 3.6 % (95% CI 1.3, 6.0). Accordingly, the odds of Brucella seropositivity were higher (OR = 12.8) in pastoral followed by agro-pastoral (OR = 4.0) in relation to sedentary production system. Large numbers of seroreactors were observed in adult age living in larger flocks with other livestock species. However, no difference was noted between male and female goats. Finally, the need for nationwide survey and subsequent designing and implementation of appropriate control measure is suggested.
- Published
- 2013
- Full Text
- View/download PDF