BVD CONSULT

Herd-level ELISA seroprevalence of bovine viral diarrhea antibodies in bulk-tank milk in Chilean dairy herds

aDepartment of Animal Production, Faculty of Livestock and Veterinary Sciences, University of Chile, Casilla 2, Correo 15, Santiago, Chile bDepartment of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, P.O. Box 100136, Gainesville, FL, USA

Abstract

Our objective in this cross-sectional study was to determine the seroprevalence in 1996 of commercial dairy herds in central Chile positive to  bovine viral diarrhea (BVD)  virus, by the detection of antibodies in bulk-tank milk samples. Samples were obtained from 501 dairy farms ( 50,000 cows) from the Metropolitan, VI, VII and VIII regions of Chile. An indirect ELISA was used to detect  BVD  antibodies. An absorbance (A450)≥0.55 was considered positive. The apparent proportion of positive herds ranged from 71.2 to 83% by region and did not differ by region. We concluded that exposure to  BVD  was widely distributed in the central area of Chile in 1996.

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This article was published in Preventive Veterinary Medicine, 60, Pedro Meléndeza and Art Donovanb, Herd-level ELISA seroprevalence of bovine viral diarrhea  antibodies in bulk-tank milk in Chilean dairy herds, 237-241, Copyright Elsevier 2003.