[Study of vaccination against infectious bronchitis of chickens with live and attenuated virus of the Massachusetts and Connecticut strains].
D000818:Animals; D001991:Bronchitis / Q000662:veterinary*; D011201:Poultry Diseases / Q000276:immunology*; D014611:Vaccination; D014777:Virus Diseases / Q000662:veterinary*
Studio della vaccinazione contro la bronchite infettiva dei polli con virus vivi ed attenuati dei tipi Massachusetts e Connecticut.