Risk factors for new bovine brucellosis infections in Colombian herds
| Autor: | Jordi Casal, Mario Peña, Liliana Cárdenas, Oscar O. Melo |
|---|---|
| Přispěvatelé: | Producció Animal, Sanitat Animal |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Male
Veterinary medicine Animal breeding 040301 veterinary sciences medicine.medical_treatment animal diseases Bovine brucellosis infection Brucella abortus Breeding Beef cattle Colombia Insemination Logistic regression 0403 veterinary science Brucellosis Bovine 03 medical and health sciences medicine Animals Animal Husbandry Insemination Artificial Dairy cattle 030304 developmental biology Cryopreservation 0303 health sciences lcsh:Veterinary medicine General Veterinary Artificial insemination Brucellosis 04 agricultural and veterinary sciences General Medicine medicine.disease Dairying Geography Risk factors Herd lcsh:SF600-1100 Cattle Female Brucella-free herds Research Article Semen Preservation |
| Zdroj: | Dipòsit Digital de Documents de la UAB Universitat Autònoma de Barcelona BMC Veterinary Research BASE-Bielefeld Academic Search Engine BMC Veterinary Research, Vol 15, Iss 1, Pp 1-8 (2019) IRTA Pubpro. Open Digital Archive Institut de Recerca i Tecnologia Agroalimentàries (IRTA) |
| Popis: | Zaida Liliana Cárdenas Contreras holds a Ph.D. grant from the Ministry of Education in Colombia (COLCIENCIAS 617/2013 scholarship). Bovine brucellosis is a zoonotic disease that causes substantial economic losses and has a strong impact on public health. The main objective of this paper is to determine the risk factors for new infections of Brucella abortus on Colombian cattle farms previously certified as being free of brucellosis. A case-control study was conducted by comparing 98 cases (farms certified as brucellosis-free for three or more years but became infected) with 93 controls (farms that remained brucellosis-free during at least the previous three years). The farms were matched by herd size and geographical location (municipality). Information was obtained via a questionnaire completed by veterinary officers through a personal interview with the herd owners. Two-thirds of the herds (67%) were dairy herds, 16% were beef herds, and 17% were dual-purpose (beef and milk) herds. After exploratory univariate analysis, all explanatory variables with a p -value of ≤0.20 were included in a logistic regression model using the forward stepwise method to select the model with the best goodness of fit. The significant risk factors were the replacement of animals from farms not certified as brucellosis-free compared to replacement from certified brucellosis-free farms (OR = 4.84, p -value < 0.001) and beef cattle farms compared to dairy cattle farms (OR = 3.61, p -value = 0.017). When herds with and without artificial insemination were compared, it was observed that farms that used natural breeding with bulls from non-certified herds had a higher risk than farms using artificial insemination (OR = 2.45, p -value = 0.037), but when the bulls came from brucellosis-free farms, farms with natural breeding were less affected (OR = 0.30, p-value = 0.004) than farms using artificial insemination, whether with frozen semen from certified brucellosis-free herds or fresh semen from uncontrolled herds. The latter is commonly sold to neighbouring farms. The government should make efforts to inform farmers about the risks involved in the introduction of semen and replacement heifers from farms that are not certified as brucellosis-free and to establish measures to control these practices. The online version of this article (10.1186/s12917-019-1825-9) contains supplementary material, which is available to authorized users. |
| Databáze: | OpenAIRE |
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