title: Bulk milk testing for antibody seroprevalences to BVDV and BHV-1 in a rural region of Peru.
abstract: Bulk milk from 60 herds of dairy cattle in a rural region in the central highlands of Peru was tested for antibodies to bovine viral-diarrhoea virus (BVDV) and bovine herpesvirus type 1 (BHV-1). None of the herds had been vaccinated against BVDV or BHV-1. Commercially available indirect ELISA-kits were used for antibody detection. True prevalences of BVDV and BHV-1 antibody-positive herds were 96 and 51%, respectively. A relatively low proportion of strongly positive herds suggests, however, a low prevalence of active BVDV infection. BVDV optical densities (ODs) in bulk milk increased with herd size--indicating a higher within-herd prevalence in the larger herds (probably, in part a consequence of a higher rate of animal movement into these herds). For BHV-1, this pattern was not found; a relatively high proportion of the herds was free from BHV-1 infection in each size category. This could indicate a low rate of reactivation of latent BHV-1 infection.
authors.affiliation: Department of Veterinary Microbiology, Section of Virology SLU, Biomedical Centre, Box 585, S-751 23 Uppsala, Sweden. karl.stahl@bmc.uu.se
authors.forename: K
authors.initials: K
authors.lastname: Ståhl
authors.forename: H
authors.initials: H
authors.lastname: Rivera
authors.forename: I
authors.initials: I
authors.lastname: Vågsholm
authors.forename: J
authors.initials: J
authors.lastname: Moreno-López
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000097:blood / Q000302:isolation & purification*; D001912:Bovine Virus Diarrhea-Mucosal Disease / Q000453:epidemiology*; D002417:Cattle; D003612:Dairying; D001908:Diarrhea Viruses, Bovine Viral / Q000276:immunology* / Q000302:isolation & purification; D004797:Enzyme-Linked Immunosorbent Assay / Q000662:veterinary; D005260:Female; D006566:Herpesviridae Infections / Q000453:epidemiology / Q000662:veterinary*; D007242:Herpesvirus 1, Bovine / Q000276:immunology* / Q000302:isolation & purification; D008892:Milk / Q000821:virology*; D010568:Peru / Q000453:epidemiology; D012423:Rural Health; D016036:Seroepidemiologic Studies
chemical_list: D000914:Antibodies, Viral