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Titolo:
Bovine viral diarrhea viral infections in feeder calves with respiratory disease: Interactions with Pasteurella spp., parainfluenza-3 virus, and bovine respiratory syncytial virus
Autore:
Fulton, RW; Purdy, CW; Confer, AW; Saliki, JT; Loan, RW; Briggs, RE; Burge, LJ;
Indirizzi:
Oklahoma State Univ, Dept Infect Dis & Physiol, Coll Vet Med, Stillwater, OK 74078 USA Oklahoma State Univ Stillwater OK USA 74078 Med, Stillwater, OK 74078 USA Oklahoma State Univ, Dept Anat Pathol & Pharmacol, Coll Vet Med, Stillwater, OK 74078 USA Oklahoma State Univ Stillwater OK USA 74078 Med, Stillwater, OK 74078 USA Oklahoma State Univ, Oklahoma Anim Dis Diagnost Lab, Coll Vet Med, Stillwater, OK 74078 USA Oklahoma State Univ Stillwater OK USA 74078 Med, Stillwater, OK 74078 USA ARS, USDA, Conservat & Prod, Bushland, TX 79012 USA ARS Bushland TX USA 79012 USDA, Conservat & Prod, Bushland, TX 79012 USA Texas A&M Univ, Coll Vet Med, Dept Vet Pathobiol, College Stn, TX 77843 USA Texas A&M Univ College Stn TX USA 77843 hobiol, College Stn, TX 77843 USA ARS, USDA, Natl Anim Dis Ctr, Ames, IA 50010 USA ARS Ames IA USA 50010ARS, USDA, Natl Anim Dis Ctr, Ames, IA 50010 USA
Titolo Testata:
CANADIAN JOURNAL OF VETERINARY RESEARCH-REVUE CANADIENNE DE RECHERCHE VETERINAIRE
fascicolo: 3, volume: 64, anno: 2000,
pagine: 151 - 159
SICI:
0830-9000(200007)64:3<151:BVDVII>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
ONTARIO FEEDLOT CALVES; RHINOTRACHEITIS VIRUS; SEROLOGICAL TITERS; TRACT DISEASE; DAIRY HERDS; CATTLE; ASSOCIATIONS; PREVALENCE; ANTIBODY; HERPESVIRUS-1;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: Fulton, RW Oklahoma State Univ, Dept Infect Dis & Physiol, Coll Vet Med, Stillwater, OK 74078 USA Oklahoma State Univ Stillwater OK USA 74078 ater, OK 74078 USA
Citazione:
R.W. Fulton et al., "Bovine viral diarrhea viral infections in feeder calves with respiratory disease: Interactions with Pasteurella spp., parainfluenza-3 virus, and bovine respiratory syncytial virus", CAN J VET R, 64(3), 2000, pp. 151-159

Abstract

The prevalence of bovine viral diarrhea virus (BVDV) infections was determined in a group of stocker calves suffering from acute respiratory disease. The calves were assembled after purchase from Tennessee auctions and transported to western Texas. Of the 120 calves, 105 (87.5%) were treated for respiratory disease. Sixteen calves died during the study (13.3%). The calvesreceived a modified live virus BHV-1 vaccine on day 0 of the study. Duringthe study, approximately 5 wk in duration, sera from the cattle, collectedat weekly intervals, were tested for BVDV by cell culture. Sera were also tested for neutralizing antibodies to BVDV types 1 and 2, bovine herpesvirus-1 (BHV-1), parainfluenza-3 virus (PI-3V), and bovine respiratory syncytial Virus (BRSV). The lungs from the 16 calves that died during the study were collected and examined by histopathology, and lung homogenates were inoculated onto cell cultures for virus isolation. There were no calves persistently infected with BVDV detected in the study, as no animals were viremic on day 0, nor were any animals viremic at the 2 subsequent serum collections. There were, however, 4 animals with BVDV type 1 noncytopathic (NCP) strains in the sera from subsequent collections. Viruses were isolated from 9 lungs: 7 with PI-3V, 1 with NCP BVDV type 1, and 1 with both BVHV-1 and BVDV. The predominant bacterial species isolated from these lungs was Pasteurella haemolytica serotype 1. There was serologic evidence of infection with BVDV types 1 and 2, PI-3V, and BRSV, as noted by seroconversion (greater thanor equal to 4-fold rise in antibody titer) in day 0 to day 34 samples collected from the 104 survivors: 40/104 (38.5%) to BVDV type 1; 29/104 (27.9%)to BVDV type 2; 71/104 (68.3%) to PI-3V; and 81/104 (77.9%) to BRSV. In several cases, the BVDV type 2 antibody titers may have been due to crossreacting BVDV type 1 antibodies; however, in 7 calves the BVDV type 2 antibodies were higher, indicating BVDV type 2 infection. At the outset of the study, the 120 calves were at risk (susceptible to viral infections) on day 0 because they were seronegative to the viruses: 98/120 (81.7%), < 1:4 to BVDV type 1; 104/120 (86.7%) < 1:4 to BVDV type 2; 86/120 (71.7%) < 1:4 to PI-3V; 87/120 (72.5%) < 1:4 to BRSV; and 111/120 (92.5%) < 1:10 to BHV-1. The results of this study indicate that BVDV types 1 and 2 are involved in acute respiratory disease of calves with pneumonic pasteurellosis. The BVDV may be detected by virus isolation from sera and/or lung tissues and by serology. The BVDV infections occurred in conjunction with infections by other Viruses associated with respiratory disease, namely, PI-SV and BRSV. These other viruses may occur singly or in combination with each other. Also, the study indicates that purchased calves may be highly susceptible, after weaning, to infections by BHV-1, BVDV types 1 and 2, PI-3V, and BRSV early in the marketing channel.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 12:09:54