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Ptitsevodstvo ; 9:65-69, 2022.
Article in Russian | CAB Abstracts | ID: covidwho-2148190


The successful experiment in large-scale commercial conditions is described with new vaccination program for broiler parental flock involving vaccination at 130 days of age (at the transfer of pullets to poultry houses for adult broiler breeders) with 4-valent vaccine PROVAC 4 against chicken infectious bronchitis, Newcastle and Gumboro diseases, and reoviral infection, together with additional vaccination against rhinotracheitis. Control treatment was vaccinated according to a standard scheme previously used in the farm, with separate vaccines against the aforementioned diseases;certain vaccines contained several antigens of a single disease. It was found that productive performance in the parental flocks and in broilers from these flocks was similar and consistently high with both vaccination schemes;the antibody titers at different ages of parental flocks were also similar. However, the cost of the experimental vaccination scheme was lower by 16% as compared to the standard one;on 4 batches of parental flock (120,000 hens each) it saved over 1 mio. rubles to the farm. The conclusion was made that vaccine PROVAC 4 can provide prolonged and effective protection of broiler parental flock and its progeny against viral diseases at low financial expenses.