Influence of category, herd size, grazing and management on epidemiology of bovine viral diarrhoea in dairy herds
| Autor: | Željko Čač, Mirko Lojkić, Željko Cvetnić, Nina Lemo, Josip Madić, Tomislav Bedeković, Ljubo Barbić, Ivana Lojkić, Miroslav Benić |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
medicine.medical_specialty
Veterinary medicine 040301 veterinary sciences animal diseases Biology Virus 0403 veterinary science Animal science Grazing Epidemiology medicine risk factors Risk factor BVDV Viral diarrhoea 2. Zero hunger lcsh:Veterinary medicine General Veterinary Dairy herds epidemiology 0402 animal and dairy science 04 agricultural and veterinary sciences 040201 dairy & animal science Herd biology.protein lcsh:SF600-1100 Antibody |
| Zdroj: | Acta Veterinaria Brno, Vol 82, Iss 2, Pp 125-130 (2013) |
| Popis: | The aim of this study was to estimate the influence of category, herd size, common grazing and management as risk factors in maintaining bovine viral diarrhoea infection in dairy herds. A total of 987 sera samples obtained from 202 heifers, 653 cows and 132 calves from 103 herds in Croatia were examined by enzyme-linked immunosorbent assay. In order to establish the prevalence of persistently infected cattle, 35 herds were selected. Ear notch tissue samples from all animals in selected herds (n = 2284) were collected and analyzed by antigen enzyme-linked immunosorbent assay. The true prevalence of specific antibodies was 61.61% and the estimated prevalence of exposure to bovine viral diarrhoea virus at the herd level was 100%. The prevalence of persistently infected animals was 0.53% and the prevalence of persistently infected herds was 20%. The antibodies prevalence was higher in cows, in herds that use common pasture and in larger herds (P < 0.001). The prevalence of persistently infected animals was not connected with the herd size but production management on big farms contributed to maintaining the virus. The obtained results suggest that production management was an important risk factor in bovine viral diarrohea epidemiology. High prevalence of antibodies and high prevalence of persistently infected herds requires implementation of control and eradication programs at a national or even regional level. The presented data complete the BVD epidemiological investigations from this part of Europe. |
| Databáze: | OpenAIRE |
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