Association between the level of antibodies in bulk tank milk and bovine respiratory syncytial virus exposure in the herd
Identifieur interne : 000A44 ( Main/Exploration ); précédent : 000A43; suivant : 000A45Association between the level of antibodies in bulk tank milk and bovine respiratory syncytial virus exposure in the herd
Auteurs : T. B. Klem [Norvège] ; T. Tollersrud [Norvège] ; O. Ster S [Norvège] ; M. Stokstad [Norvège]Source :
- The Veterinary Record [ 0042-4900 ] ; 2014.
Abstract
Antibody levels in bulk tank milk (BTM) against bovine respiratory syncytial virus (BRSV) are used to classify BRSV status of herds. The aim of this study was to investigate how these levels correspond with the time at which the herds were infected. Bulk tank milk, individual milk and serum samples from cows and young stock were investigated using an indirect ELISA. Screenings of BTM from 89 dairy herds during two winter seasons revealed a prevalence of positive herds from 82 per cent to 85 per cent. Eleven herds showed a marked increase in antibody levels between two screenings, indicating new infection. However, two of these herds had been free from BRSV for the last five to seven years. Two newly infected herds were monitored for four years and did not appear to get reinfected. Surprisingly, the BTM antibody levels in these herds remained high throughout the study period, but fluctuated significantly. This shows that the levels of antibodies in BTM can remain high for several years, even in herds where reinfection does not occur. BTM serology is a useful tool in the monitoring of infectious diseases in dairy herds, but has limitations as a diagnostic tool for BRSV infections.
Url:
DOI: 10.1136/vr.102403
PubMed: 24864076
PubMed Central: 4112425
Affiliations:
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B." last="Klem">T. B. Klem</name><affiliation wicri:level="1"><nlm:aff id="af1">Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep., Oslo NO-0033, Norway</nlm:aff><country xml:lang="fr">Norvège</country><wicri:regionArea>Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep., Oslo NO-0033</wicri:regionArea><placeName><settlement type="city">Oslo</settlement><region nuts="2">Østlandet</region></placeName></affiliation></author><author><name sortKey="Tollersrud, T" sort="Tollersrud, T" uniqKey="Tollersrud T" first="T." last="Tollersrud">T. Tollersrud</name><affiliation wicri:level="1"><nlm:aff id="af2">Norwegian Veterinary Institute, P.O. Box 750 Sentrum, Oslo NO-0106, Norway</nlm:aff><country xml:lang="fr">Norvège</country><wicri:regionArea>Norwegian Veterinary Institute, P.O. 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Box 8146 Dep., Oslo NO-0033, Norway</nlm:aff><country xml:lang="fr">Norvège</country><wicri:regionArea>Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep., Oslo NO-0033</wicri:regionArea><placeName><settlement type="city">Oslo</settlement><region nuts="2">Østlandet</region></placeName></affiliation></author></analytic><series><title level="j">The Veterinary Record</title><idno type="ISSN">0042-4900</idno><idno type="eISSN">2042-7670</idno><imprint><date when="2014">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Antibody levels in bulk tank milk (BTM) against bovine respiratory syncytial virus (BRSV) are used to classify BRSV status of herds. The aim of this study was to investigate how these levels correspond with the time at which the herds were infected. Bulk tank milk, individual milk and serum samples from cows and young stock were investigated using an indirect ELISA. Screenings of BTM from 89 dairy herds during two winter seasons revealed a prevalence of positive herds from 82 per cent to 85 per cent. Eleven herds showed a marked increase in antibody levels between two screenings, indicating new infection. However, two of these herds had been free from BRSV for the last five to seven years. Two newly infected herds were monitored for four years and did not appear to get reinfected. Surprisingly, the BTM antibody levels in these herds remained high throughout the study period, but fluctuated significantly. This shows that the levels of antibodies in BTM can remain high for several years, even in herds where reinfection does not occur. BTM serology is a useful tool in the monitoring of infectious diseases in dairy herds, but has limitations as a diagnostic tool for BRSV infections.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Beaudeau, F" uniqKey="Beaudeau F">F. Beaudeau</name></author><author><name sortKey="Ohlson, A" uniqKey="Ohlson A">A. Ohlson</name></author><author><name sortKey="Emanuelson, U" uniqKey="Emanuelson U">U. Emanuelson</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Bidokhti, M R" uniqKey="Bidokhti M">M. R. Bidokhti</name></author><author><name sortKey="Tr Ven, M" uniqKey="Tr Ven M">M. Tråvén</name></author><author><name sortKey="Fall, N" uniqKey="Fall N">N. Fall</name></author><author><name sortKey="Emanuelson, U" uniqKey="Emanuelson U">U. Emanuelson</name></author><author><name sortKey="Alenius, S" uniqKey="Alenius S">S. 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Van nieuwstadt</name></author></analytic></biblStruct></listBibl></div1></back></TEI><affiliations><list><country><li>Norvège</li></country><region><li>Østlandet</li></region><settlement><li>Oslo</li></settlement></list><tree><country name="Norvège"><region name="Østlandet"><name sortKey="Klem, T B" sort="Klem, T B" uniqKey="Klem T" first="T. B." last="Klem">T. B. Klem</name></region><name sortKey=" Ster S, O" sort=" Ster S, O" uniqKey=" Ster S O" first="O." last=" Ster S">O. Ster S</name><name sortKey="Stokstad, M" sort="Stokstad, M" uniqKey="Stokstad M" first="M." last="Stokstad">M. Stokstad</name><name sortKey="Tollersrud, T" sort="Tollersrud, T" uniqKey="Tollersrud T" first="T." last="Tollersrud">T. Tollersrud</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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