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Titolo:
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
Autore:
OConnor, A; Martin, SW; Nagy, E; Menzies, P; Harland, R;
Indirizzi:
Univ Guelph, Dept Populat Med, Guelph, ON N1G 2W1, Canada Univ Guelph Guelph ON Canada N1G 2W1 ulat Med, Guelph, ON N1G 2W1, Canada Univ Guelph, Dept Pathobiol, Guelph, ON N1G 2W1, Canada Univ Guelph Guelph ON Canada N1G 2W1 athobiol, Guelph, ON N1G 2W1, Canada Univ Guelph, Novartis Anim Hlth Inc, Guelph, ON N1G 2W1, Canada Univ Guelph Guelph ON Canada N1G 2W1 Hlth Inc, Guelph, ON N1G 2W1, Canada
Titolo Testata:
CANADIAN JOURNAL OF VETERINARY RESEARCH-REVUE CANADIENNE DE RECHERCHE VETERINAIRE
fascicolo: 3, volume: 65, anno: 2001,
pagine: 137 - 142
SICI:
0830-9000(200107)65:3<137:TRBTOO>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
WEIGHT-GAIN; WESTERN CANADA; SHIPPING FEVER; TRACT DISEASE; CALVES; ASSOCIATION; PASTEURELLA; PREVALENCE; INFECTION; PATHOGENS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: O'Connor, A Iowa State Univ Sci & Technol, Dept Vet Diagnost & Prod Anim Med, Ames, IA50011 USA Iowa State Univ Sci & Technol Ames IA USA 50011 , IA50011 USA
Citazione:
A. O'Connor et al., "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", CAN J VET R, 65(3), 2001, pp. 137-142

Abstract

Serological evidence of previous viral exposure (titer at arrival) and current viral exposure (titer increase) during a 28-day study period, was usedto 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 subsequentUBRD 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 majorityof 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 UBRDoccurrence, however consistent with other literature, BVDV may be causallyrelated to UBRD occurrence.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/01/20 alle ore 06:31:53