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The aim of this study was a comparison of the occurrence and presence of Mareks disease strain HVT FC 126 in internal organs after in ovo vaccination and after vaccination of one day old chicks. One hundred SPF chicken embryos were used in the experiment on the 18th day of incubation. Forty-five embryos were vaccinated in ovo with a dose of 2400 pfu of virus HVT FC 126. Twenty-eight embryos were injected...
In 1991-1995 the incidence of Salmonella infection was studied in poultry from chicken farms in the Warsaw, Ciechanów, Siedlce and Radom voivodeships. Since 1994 infections with Salmonella enteritidis have been increasing dramatically. This serotype was most commonly isolated in chickens under 3 days of age, which suggests transovarian transmission from infected breeder flocks. Chemioterapeutic susceptibility...
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