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	Provedor de dados Rev. Bras. Ciênc. Avic. (2) Autor Andreatti Filho,RF (1) Berchieri Junior,A (1) Gonçalves,GAM (1) Menconi,A (1) Moura,BS (1) Okamoto,AS (1) Paiva,JB (1) Penha Filho,RAC (1) Rocha,TS (1) Savano,EN (1) Sesti,L (1) Mais... Palavra-chave Reversion to virulence (2) 9R strain (1) Attenuation (1) Chicken (1) Fowl typhoid (1) Immune response (1) SG9R vaccine (1) Salmonella Gallinarum (1) Salmonella vaccine (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2012 (1) 2010 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Safety and efficacy of a salmonella gallinarum ΔcobSΔcbiA strain with potential to prevent chicken infections by salmonella gallinarum and salmonella enteritidis Rev. Bras. Ciênc. Avic. Paiva,JB; Penha Filho,RAC; Moura,BS; Berchieri Junior,A. New vaccine design techniques have allowed the development of effective vaccine strains against Salmonella infections inwhich the risks of reversion to the wild type and virulence is null. The mutant strain Salmonella Gallinarum ΔcobSΔcbiA 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... Tipo: Info:eu-repo/semantics/article Palavras-chave: Salmonella vaccine; Attenuation; Reversion to virulence; Chicken; Immune response. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000200005 Reversion to virulence evaluation of a 9R vaccine strain of Salmonella enterica serovar gallinarum in commercial brown layers Rev. Bras. Ciênc. Avic. Okamoto,AS; Menconi,A; Gonçalves,GAM; Rocha,TS; Andreatti Filho,RF; Savano,EN; Sesti,L. The live vaccine Cevac S. Gallinarum, made from a rough strain of Salmonella enterica subspecies enterica serotype Gallinarum is used for preventing fowl typhoid, a disease that still causes considerable economic losses in countries with a developing poultry industry. The objective of this paper was to evaluate a possible reversion to virulence of the strain used in a vaccine in commercial brown layers. Only Salmonella-free chicks were utilized. One hundred twenty (120) 12-day-old Dekalb brown layers divided in two trials were used. The first trial had six groups of 15 birds each. Birds of group 1 were vaccinated with 10 doses of Cevac S. Gallinarum subcutaneously and 10 doses orally, in a total of 20 doses of vaccine. Then the birds of groups 2, 3, 4, and... Tipo: Info:eu-repo/semantics/article Palavras-chave: 9R strain; Fowl typhoid; Reversion to virulence; Salmonella Gallinarum; SG9R vaccine. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000100007 Registros recuperados: 2 Primeira ... 1 ... Última

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