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Titolo:
AN EXPERIMENTAL-STUDY OF A CONCURRENT PRIMARY INFECTION WITH BOVINE RESPIRATORY SYNCYTIAL VIRUS (BRSV) AND BOVINE VIRAL DIARRHEA VIRUS (BVDV) IN CALVES
Autore:
ELVANDER M; BAULE C; PERSSON M; EGYED L; BALLAGIPORDANY A; BELAK S; ALENIUS S;
Indirizzi:
NATL VET INST,DEPT CATTLE & SHEEP,POB 7073 S-75007 UPPSALA SWEDEN NATL VET INST,DEPT VIROL S-75007 UPPSALA SWEDEN
Titolo Testata:
Acta veterinaria Scandinavica
fascicolo: 2, volume: 39, anno: 1998,
pagine: 251 - 264
SICI:
0044-605X(1998)39:2<251:AEOACP>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRACT DISEASE; ANTIBODIES; ASSOCIATIONS; PNEUMONIA; SAMPLES; MILK; PCR;
Keywords:
CATTLE; RESPIRATORY DISEASE; INTERFERON; PCR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
27
Recensione:
Indirizzi per estratti:
Citazione:
M. Elvander et al., "AN EXPERIMENTAL-STUDY OF A CONCURRENT PRIMARY INFECTION WITH BOVINE RESPIRATORY SYNCYTIAL VIRUS (BRSV) AND BOVINE VIRAL DIARRHEA VIRUS (BVDV) IN CALVES", Acta veterinaria Scandinavica, 39(2), 1998, pp. 251-264

Abstract

Experimental infections with bovine respiratory syncytial virus (BRSV) and bovine viral diarrhoea virus (BVDV) were performed to study the effect of concurrent BRSV and BVDV infections. Twelve seronegative calves, in 3 groups, were inoculated on a single occasion with pure BRSV (group A), BRSV and noncytopathogenic BVDV (group B) or mock infected (group C). Mild respiratory symptoms were recorded 4 to 5 days post inoculation (dpi) in group A and group B calves. One calf in group A wasseverely affected and required medical treatment. In group B, fever (40.7-41.4 degrees C) was prominent 7 to 8 dpi. Only calves in group B were BVDV positive in purified lymphocytes at 2 to 14 dpi and showed increased serum interferon levels, with a peak at 4 dpi, indicating BVDV to be responsible for inducing the rise. BRSV was detected in lung lavage fluids up to 7 dpi for group A calves, compared to 11 dpi for group B and calves in this group also seroconverted later displaying lower BRSV titers. The time lag before an antibody response and the titers recorded in group B, indicated that the duration of BVDV infection in lymphocytes negatively influenced the capacity to mount a BRSV antibody response.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 15:32:47