Evaluation of an Enzyme‐Linked Immunosorbent Assay for Detection of Antibodies to Bovine Virus Diarrhoea Virus in Milk
- 12 January 1989
- journal article
- research article
- Published by Wiley in Journal of Veterinary Medicine, Series B
- Vol. 36 (1-10) , 113-118
- https://doi.org/10.1111/j.1439-0450.1989.tb00576.x
Abstract
Summary The present study shows that milk is an appropriate source for detection of seroreactors to bovine virus diarrhoea virus (BVDV). There was close agreement between antibody titres in serum and in skim milk, as determined by an indirect enzyme-linked immunosorbent assay. The antibody titres were usually lower in skim milk than in serum, but all seropositive cows (n = 84) were also skim milk-positive and all but one seronegative cow (n = 55) proved negative in skim milk. During lactation, the level of antibodies to BVDV in milk showed an inverse relationship to the amount of milk produced. However, there was a sufficient level of antibodies in milk throughout lactation to permit an adequate determination of BVDV antibody status in dairy cows. There was a mutual good agreement between milk antibody titre in the four mammary quarters, irrespective of milk cell count. Milk can be used to detect seroreactors to BVDV. Milk is preferable to blood in large-scale epidemiological studies, since the sampling procedure is much simpler. Zusammenfassung Entwicklung von einem Enzyme-Linked Immunosorbent Assay zum Nachweis von Antikörpern gegen das Virus der Bovinen Virusdiarrhoe in der Milch Die vorliegende Studie zeigt auf, daß Milch ein geeignetes Untersuchungsmaterial ist, um serologisch positive Reagenten gegen das Virus der Bovinen Virusdiarrhoe (BVDV) aufzufinden. Die mittels indirektem Enzyme linked Immunosorbent Assay bestimmten Antikörpertiter in Serum und in Magermilch stimmten gut überein. Die Antikörpertiter in Magermilch waren im allgemeinen niedriger als im Serum, aber alle seropositiven Kühe (n = 84) waren auch in der Magermilch positiv und alle seronegativen Kühe mit einer Ausnahme (n = 55) auch in der Magermilch negativ. Im Verlaufe der Laktation verhielt sich der Antikörperspiegel gegen BVDV in der Milch umgekehrt proportional zur erzeugten Milchmenge. Während der gesamten Laktation war der Antikörperspiegel in der Milch jedoch hoch genug, um eine Untersuchung des Antikörperstatus gegen BVDV durchführen zu können. Der Antikörpertiter in der Milch stimmte in allen vier Eutervierteln gut überein, unabhängig vom Zellgehalt der Milch. Folglich kann Milch zur Erfassung von serologisch positiven Reagenten gegen BVDV verwendet werden. Für umfassende epidemiologische Studien ist Milch als Untersuchungsmaterial wegen der leichteren Probennahme dem Blut vorzuziehen.Keywords
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