Immune responses to non-structural protein 3 (NS3) of bovine viral diarrhoea virus (BVDV) in NS3 DNA vaccinated and naturally infected cattle.
Prev Vet Med
; 72(1-2): 115-20; discussion 215-9, 2005 Nov 15.
Article
em En
| MEDLINE
| ID: mdl-16169103
ABSTRACT
Immune responses to non-structural protein 3 (NS3) of bovine viral diarrhoea virus (BVDV) were investigated. cDNA encoding NS3 from type 1a BVDV was used to vaccinate five calves, another five calves remained unvaccinated. Three weeks after final vaccination animals were challenged intranasally with heterologous type 1a BVDV. Anti-NS3 antibodies were detected in only one animal post-vaccination. Partial protection from virus challenge was observed in the vaccinates. Virus was not isolated from nasal mucosa of two vaccinates, and virus clearance from nasal mucosa was faster in the vaccinates compared to the controls. While elevated rectal temperatures were evident in both groups 7 days post-challenge, the mean increase in the controls was twice that observed in the vaccinates. In conclusion, NS3 DNA vaccination induced humoral immunity in one calf, and prevented fever and virus establishment in the nasal mucosa in 2/5 calves, demonstrating the efficacy of NS3 vaccination, which may benefit future development of pestivirus and flavivirus vaccines.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Peptídeo Hidrolases
/
Doença das Mucosas por Vírus da Diarreia Viral Bovina
/
Vacinas Virais
/
Vacinação
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Proteínas não Estruturais Virais
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Vírus da Diarreia Viral Bovina
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Vacinas de DNA
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RNA Helicases
Limite:
Animals
Idioma:
En
Revista:
Prev Vet Med
Ano de publicação:
2005
Tipo de documento:
Article
País de afiliação:
Reino Unido