Bovine coronavirus (BCV) infections in transported commingled beef cattle and sole-source ranch calves
Identifieur interne : 000C63 ( Main/Exploration ); précédent : 000C62; suivant : 000C64Bovine coronavirus (BCV) infections in transported commingled beef cattle and sole-source ranch calves
Auteurs : Robert W. Fulton ; Douglas L. Step ; Jackie Wahrmund ; Lurinda J. Burge ; Mark E. Payton ; Billy J. Cook ; Dirk Burken ; Chris J. Richards ; Anthony W. ConferSource :
- Canadian Journal of Veterinary Research [ 0830-9000 ] ; 2011.
Abstract
This study investigated bovine coronavirus (BCV) in both beef calves direct from the ranch and commingled, mixed-source calves obtained from an auction market. The level of BCV-neutralizing antibodies found in the calves varied among ranches in 2 different studies in a retained-ownership program (ROP), from the ranch to the feedlot. Calves with low levels of BCV-neutralizing antibodies (16 or less) were more likely to be treated for bovine respiratory disease (BRD) than those with higher titers. In 3 studies of commingled, mixed-source calves, BCV was recovered from calves at entry to the feedlot and the infections were cleared by day 8. The BCV was identified in lung samples [bronchoalveolar lavage (BAL) collection] as well as in nasal swabs. Calves with low levels of BCV-neutralizing antibodies at entry were most likely to be shedding BCV. Bovine coronavirus was isolated from both healthy and sick calves, but not from sick calves after 4 d arrival at the feedlot. Bovine coronavirus (BCV) should be considered along with other bovine respiratory viruses in the diagnosis of etiologies in bovine respiratory disease, especially for animals that become sick shortly after arrival. If approved vaccines are developed, it would be best to carry out vaccination programs before calves are weaned, giving them sufficient time to gain active immunity before commingling with other cattle.
Url:
PubMed: 22210995
PubMed Central: 3122965
Affiliations:
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Fulton</name></author><author><name sortKey="Step, Douglas L" sort="Step, Douglas L" uniqKey="Step D" first="Douglas L." last="Step">Douglas L. Step</name></author><author><name sortKey="Wahrmund, Jackie" sort="Wahrmund, Jackie" uniqKey="Wahrmund J" first="Jackie" last="Wahrmund">Jackie Wahrmund</name></author><author><name sortKey="Burge, Lurinda J" sort="Burge, Lurinda J" uniqKey="Burge L" first="Lurinda J." last="Burge">Lurinda J. Burge</name></author><author><name sortKey="Payton, Mark E" sort="Payton, Mark E" uniqKey="Payton M" first="Mark E." last="Payton">Mark E. Payton</name></author><author><name sortKey="Cook, Billy J" sort="Cook, Billy J" uniqKey="Cook B" first="Billy J." last="Cook">Billy J. Cook</name></author><author><name sortKey="Burken, Dirk" sort="Burken, Dirk" uniqKey="Burken D" first="Dirk" last="Burken">Dirk Burken</name></author><author><name sortKey="Richards, Chris J" sort="Richards, Chris J" uniqKey="Richards C" first="Chris J." last="Richards">Chris J. Richards</name></author><author><name sortKey="Confer, Anthony W" sort="Confer, Anthony W" uniqKey="Confer A" first="Anthony W." last="Confer">Anthony W. Confer</name></author></analytic><series><title level="j">Canadian Journal of Veterinary Research</title><idno type="ISSN">0830-9000</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>This study investigated bovine coronavirus (BCV) in both beef calves direct from the ranch and commingled, mixed-source calves obtained from an auction market. The level of BCV-neutralizing antibodies found in the calves varied among ranches in 2 different studies in a retained-ownership program (ROP), from the ranch to the feedlot. Calves with low levels of BCV-neutralizing antibodies (16 or less) were more likely to be treated for bovine respiratory disease (BRD) than those with higher titers. In 3 studies of commingled, mixed-source calves, BCV was recovered from calves at entry to the feedlot and the infections were cleared by day 8. The BCV was identified in lung samples [bronchoalveolar lavage (BAL) collection] as well as in nasal swabs. Calves with low levels of BCV-neutralizing antibodies at entry were most likely to be shedding BCV. Bovine coronavirus was isolated from both healthy and sick calves, but not from sick calves after 4 d arrival at the feedlot. Bovine coronavirus (BCV) should be considered along with other bovine respiratory viruses in the diagnosis of etiologies in bovine respiratory disease, especially for animals that become sick shortly after arrival. If approved vaccines are developed, it would be best to carry out vaccination programs before calves are weaned, giving them sufficient time to gain active immunity before commingling with other cattle.</p></div></front></TEI><affiliations><list></list><tree><noCountry><name sortKey="Burge, Lurinda J" sort="Burge, Lurinda J" uniqKey="Burge L" first="Lurinda J." last="Burge">Lurinda J. Burge</name><name sortKey="Burken, Dirk" sort="Burken, Dirk" uniqKey="Burken D" first="Dirk" last="Burken">Dirk Burken</name><name sortKey="Confer, Anthony W" sort="Confer, Anthony W" uniqKey="Confer A" first="Anthony W." last="Confer">Anthony W. Confer</name><name sortKey="Cook, Billy J" sort="Cook, Billy J" uniqKey="Cook B" first="Billy J." last="Cook">Billy J. Cook</name><name sortKey="Fulton, Robert W" sort="Fulton, Robert W" uniqKey="Fulton R" first="Robert W." last="Fulton">Robert W. Fulton</name><name sortKey="Payton, Mark E" sort="Payton, Mark E" uniqKey="Payton M" first="Mark E." last="Payton">Mark E. Payton</name><name sortKey="Richards, Chris J" sort="Richards, Chris J" uniqKey="Richards C" first="Chris J." last="Richards">Chris J. Richards</name><name sortKey="Step, Douglas L" sort="Step, Douglas L" uniqKey="Step D" first="Douglas L." last="Step">Douglas L. Step</name><name sortKey="Wahrmund, Jackie" sort="Wahrmund, Jackie" uniqKey="Wahrmund J" first="Jackie" last="Wahrmund">Jackie Wahrmund</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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