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Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.contributor | Universidade Estadual Paulista (Unesp) | - |
Autor(es): dc.creator | Paiva, J. B. | - |
Autor(es): dc.creator | Penha Filho, R. A. C. | - |
Autor(es): dc.creator | Moura, B. S. | - |
Autor(es): dc.creator | Berchieri Junior, A. | - |
Data de aceite: dc.date.accessioned | 2022-02-22T00:03:48Z | - |
Data de disponibilização: dc.date.available | 2022-02-22T00:03:48Z | - |
Data de envio: dc.date.issued | 2020-12-09 | - |
Data de envio: dc.date.issued | 2020-12-09 | - |
Data de envio: dc.date.issued | 2012-04-01 | - |
Fonte completa do material: dc.identifier | http://hdl.handle.net/11449/194770 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/11449/194770 | - |
Descrição: dc.description | New vaccine design techniques have allowed the development of effective vaccine strains against Salmonella infections in which the risks of reversion to the wild type and virulence is null. The mutant strain Salmonella Gallinarum Delta cobS Delta cbiA was previously shown to be avirulent in chickens. In this study, this strain was tested as a vaccine against Salmonella Gallinarum (SG) and S. Enteritidis (SE) infections, and its protection levels, safety and possible risks of reversion to virulence after vaccination of layers were evaluated. Birds were vaccinated at five days of age or at five and 25 days of age. At 45 days of age, brown and white layers were challenged with SG and SE wild strains, respectively. Two assays to test the possibility of reversion to virulence were performed. Five successive bacterial passages in brown layers were carried out in the first assay. In the second assay, brown layers received a ten-fold concentrated inoculum of the SG Delta cobS Delta cbiA strain and were evaluated for clinical signs and mortality. In both experiments, no birds that received the inoculation of the attenuated strain died. Additionally, the use of the mutant strain as a vaccine provided good protection levels against both challenge strains. | - |
Descrição: dc.description | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | - |
Descrição: dc.description | Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) | - |
Formato: dc.format | 115-120 | - |
Idioma: dc.language | en | - |
Publicador: dc.publisher | Facta-fundacio Arnco Ciencia Tecnologia Avicolas | - |
Relação: dc.relation | Brazilian Journal Of Poultry Science | - |
???dc.source???: dc.source | Web of Science | - |
Palavras-chave: dc.subject | Salmonella vaccine | - |
Palavras-chave: dc.subject | attenuation | - |
Palavras-chave: dc.subject | reversion to virulence | - |
Palavras-chave: dc.subject | chicken | - |
Palavras-chave: dc.subject | immune response | - |
Título: dc.title | Safety and Efficacy of a Salmonella Gallinarum Delta cobS Delta cbiA Strain with Potential to Prevent Chicken Infections by Salmonella Gallinarum and Salmonella Enteritidis | - |
Tipo de arquivo: dc.type | livro digital | - |
Aparece nas coleções: | Repositório Institucional - Unesp |
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