title: Field experiments with viral arthritis/tenosynovitis vaccination of breeder chickens.
abstract: Vaccination of three commercial broiler-breeder flocks at 15 weeks old with viral arthritis/tenosynovitis via the drinking water resulted in serologic conversion of two flocks to agar-gel-precipitin (AGP)-positive, while the third flock was still AGP-negative at 24 weeks, but was AGP-positive at 30 weeks old, presumably as a result of natural exposure. Progeny from the two successfully vaccinated breeder flocks remained free of clinical viral arthritis/tenosynovitis and had average condemnation rates of 0.99%. In contrast, six hatches of progeny from the third breeder flock experienced clinical viral arthritis/tenosynovitis and average condemnation rates of 3.64%.
mesh_terms: D000818:Animals; D001170:Arthritis, Infectious / Q000517:prevention & control / Q000662:veterinary*; D002645:Chickens; D011201:Poultry Diseases / Q000517:prevention & control*; D012087:Reoviridae / Q000276:immunology; D012088:Reoviridae Infections / Q000517:prevention & control / Q000662:veterinary*; D013717:Tenosynovitis / Q000517:prevention & control / Q000662:veterinary*; D014611:Vaccination / Q000662:veterinary*