Prevalence of bovine viral diarrhoea virus antibodies in bulk tank milk of industrial dairy cattle herds in suburb of Mashhad-Iran.
Bulk milk for the presence of antibodies against bovine viral diarrhea virus (BVDV) from 38 industrial dairy cattle herds complexes with 250-3000 Holstein dairy cows in suburb of Mashhad-Iran was tested. None of the herds were vaccinated against BVDV. Commercial indirect ELISA-kit for the detection of specific antibodies was used. The result could be read visually where the optical density (OD) was measured at 450 nm. The percent positivity (PP) values >or=7 and <7 interpreted positive and negative, respectively. According to this study the apparent and the true prevalence of BVDV antibody-positive herds was 89.47 and 93.98%, respectively. The range of PP was 1.59-107.66 among the herds. The OD in 52.63% bulk milk of the herds was very high. It is concluded that exposure to BVD virus was widely distributed in the dairy cattle herds in suburb of Mashhad-Iran.
Garoussi
M Talebkhan
MT
Department of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran. garoussi@ferdowsi.um.ac.ir
Haghparast
A
A
Estajee
H
H
D000818:Animals; D000914:Antibodies, Viral / Q000302:isolation & purification*; D001912:Bovine Virus Diarrhea-Mucosal Disease / Q000453:epidemiology* / Q000276:immunology; D002417:Cattle; D003612:Dairying; D001908:Diarrhea Viruses, Bovine Viral / Q000276:immunology*; D005260:Female; D007492:Iran / Q000453:epidemiology; D008892:Milk / Q000276:immunology*; D015995:Prevalence
D000914:Antibodies, Viral