Epidemiological pattern and risk factors associated with bovine viral-diarrhoea virus (BVDV) infection in a non-vaccinated dairy-cattle population from the Asturias region of Spain.
A survey of bovine viral-diarrhoea virus (BVDV) infection was carried out in a non-vaccinated cattle population from the Asturias region of Spain in 1997 to assess seroprevalence and identify risk factors associated with infection. Twenty-eight herds were included; 529 cows were bled. Information regarding the herd and each animal sampled were recorded through a personal interview with the farmer. The true prevalence was estimated to be 21%. According to the antibody-age profiles and the herd-management characteristics, no persistently infected animals were suspected at that time within the herds sampled. Random-effects logistic regression found two major factors associated with seropositivity: age and cow origin. Results suggested that BVDV infection could be controlled in that area by livestock-trade control (without vaccines). In addition, an increasing risk of abortion was not observed when cows were seropositive to both BVDV and Neospora caninum infections.
Mainar-Jaime
R C
RC
Facultad de Veterinaria, Departamento de Patología Animal, Universidad de León, Sanidad Animal, Campus de Vegazana, 24071, León, Spain. dsarmj@unileon.es
Berzal-Herranz
B
B
Arias
P
P
Rojo-Vázquez
F A
FA
D000034:Abortion, Veterinary / Q000209:etiology; D000367:Age Factors; D000822:Animal Husbandry; D000818:Animals; D001912:Bovine Virus Diarrhea-Mucosal Disease / Q000453:epidemiology* / Q000209:etiology; D002417:Cattle; D003048:Coccidiosis / Q000150:complications; D003625:Data Collection; D001908:Diarrhea Viruses, Bovine Viral / Q000472:pathogenicity*; D016021:Epidemiologic Studies; D005260:Female; D018688:Neospora; D015995:Prevalence; D012307:Risk Factors; D012698:Serologic Tests