The relationship between the occurrence of undifferentiated bovine respiratory disease and titer changes to bovine coronavirus and bovine viral diarrhea virus in 3 Ontario feedlots.
Identifieur interne : 001121 ( Main/Exploration ); précédent : 001120; suivant : 001122The relationship between the occurrence of undifferentiated bovine respiratory disease and titer changes to bovine coronavirus and bovine viral diarrhea virus in 3 Ontario feedlots.
Auteurs : A. O'Connor ; S W Martin ; E. Nagy ; P. Menzies ; R. HarlandSource :
- Canadian Journal of Veterinary Research [ 0830-9000 ] ; 2001.
Abstract
Serological evidence of previous viral exposure (titer at arrival) and current viral exposure (titer increase) during a 28-day study period, was used to determine if bovine coronavirus (BCV) or bovine viral diarrhea virus (BVDV) was associated with the occurrence of undifferentiated bovine respiratory disease (UBRD) in feedlot calves. Neutralizing antibody titers to BCV and BVDV were determined for 852 animals from 3 Ontario feedlots. Calves at 2 of the 3 feedlots (n = 753) received a modified live 4-way viral vaccine containing BVDV. On arrival at the feedlots, 90% of animals were seropositive for BCV, while 39% of animals were seropositive for BVDV. This evidence of previous exposure to both viruses was associated with reduced subsequent UBRD risk. Evidence of exposure to BCV during the study period was common, as 50% of animals showed a 16-fold or greater titer increase; however, treatment for UBRD was not associated with titer change. Although the majority of animals were vaccinated for BVDV at arrival, within a feedlot, animals treated for UBRD had larger titer increases to BVDV than non-treated animals. Based on our findings we infer that BCV was not causally related to UBRD occurrence, however consistent with other literature, BVDV may be causally related to UBRD occurrence.
Url:
PubMed: 11480517
PubMed Central: 1189666
Affiliations:
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Le document en format XML
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O'Connor</name></author><author><name sortKey="Martin, S W" sort="Martin, S W" uniqKey="Martin S" first="S W" last="Martin">S W Martin</name></author><author><name sortKey="Nagy, E" sort="Nagy, E" uniqKey="Nagy E" first="E" last="Nagy">E. Nagy</name></author><author><name sortKey="Menzies, P" sort="Menzies, P" uniqKey="Menzies P" first="P" last="Menzies">P. Menzies</name></author><author><name sortKey="Harland, R" sort="Harland, R" uniqKey="Harland R" first="R" last="Harland">R. Harland</name></author></analytic><series><title level="j">Canadian Journal of Veterinary Research</title><idno type="ISSN">0830-9000</idno><imprint><date when="2001">2001</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Serological evidence of previous viral exposure (titer at arrival) and current viral exposure (titer increase) during a 28-day study period, was used to determine if bovine coronavirus (BCV) or bovine viral diarrhea virus (BVDV) was associated with the occurrence of undifferentiated bovine respiratory disease (UBRD) in feedlot calves. Neutralizing antibody titers to BCV and BVDV were determined for 852 animals from 3 Ontario feedlots. Calves at 2 of the 3 feedlots (n = 753) received a modified live 4-way viral vaccine containing BVDV. On arrival at the feedlots, 90% of animals were seropositive for BCV, while 39% of animals were seropositive for BVDV. This evidence of previous exposure to both viruses was associated with reduced subsequent UBRD risk. Evidence of exposure to BCV during the study period was common, as 50% of animals showed a 16-fold or greater titer increase; however, treatment for UBRD was not associated with titer change. Although the majority of animals were vaccinated for BVDV at arrival, within a feedlot, animals treated for UBRD had larger titer increases to BVDV than non-treated animals. Based on our findings we infer that BCV was not causally related to UBRD occurrence, however consistent with other literature, BVDV may be causally related to UBRD occurrence.</p></div></front></TEI><affiliations><list></list><tree><noCountry><name sortKey="Harland, R" sort="Harland, R" uniqKey="Harland R" first="R" last="Harland">R. Harland</name><name sortKey="Martin, S W" sort="Martin, S W" uniqKey="Martin S" first="S W" last="Martin">S W Martin</name><name sortKey="Menzies, P" sort="Menzies, P" uniqKey="Menzies P" first="P" last="Menzies">P. Menzies</name><name sortKey="Nagy, E" sort="Nagy, E" uniqKey="Nagy E" first="E" last="Nagy">E. Nagy</name><name sortKey="O Connor, A" sort="O Connor, A" uniqKey="O Connor A" first="A" last="O'Connor">A. O'Connor</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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