|
|
| 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 |
| |
