Summary
An indirect ELISA has been evaluated for determination of the level of antibodies to BVDV in individual milk samples and recently in bulk tank milk from dairy herds. As part of an epidemiological study, bulk milk and individual milk samples from all cows in 15 dairy herds were analysed for antibodies to BVDV two times one year apart. There was an excellent correlation between the level of antibodies in the bulk tank milk and the prevalence of BVDV antibody positive cows. The mean prevalence of BVDV antibody positive cows in the 15 dairy herds was 45.5% (188/413) at the first sampling and 46.2% (191/413) one year later. Seven of the herds had no, or only a low number of, antibody positive cows. In contrast, between 52 to 100% of the cows in seven other herds were antibody positive to BVDV. In the 15th herd all cows without antibodies at the first sampling were antibody positive to BVDV one year later, indicating a recently introduced BVDV infection in this herd.
Analysis of bulk milk samples for BVDV antibodies is now routinely used in Sweden as a tool in diagnosis and prophylaxis of BVDV infections in dairy herds. the importance and advantages of this diagnostic technique, that has made it possible to establish BVDV-free dairy herds, is discussed.
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Niskanen R (1991) The level of antibodies to bovine virus diarrhoea virus in bulk tank milk from dairy herds reflects the herd immunity to this virus. (Submitted for pubhcation)
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© 1991 Springer-Verlag
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Niskanen, R., Alenius, S., Larsson, B., Jacobsson, SO. (1991). Determination of level of antibodies to bovine virus diarrhoea virus (BVDV) in bulk tank milk as a tool in the diagnosis and prophylaxis of BVDV infections in dairy herds. In: Liess, B., Moennig, V., Pohlenz, J., Trautwein, G. (eds) Ruminant Pestivirus Infections. Archives of Virology, vol 3. Springer, Vienna. https://doi.org/10.1007/978-3-7091-9153-8_30
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DOI: https://doi.org/10.1007/978-3-7091-9153-8_30
Publisher Name: Springer, Vienna
Print ISBN: 978-3-211-82279-1
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