INFECTIOUS-BRONCHITIS VACCINES FOR POULTRY, COMBINED INFECTIOUS-BRONCHITIS VACCINES, PROCESS FOR PREPARING SUCH VACCINES, PROCESS FOR PREVENTING INFECTIOUS BRONCHITIS AND INFECTIOUS-BRONCHITIS VIRUS STRAINS

摘要

Infectious bronchitis (IB) vaccines for poultry derived from at least one novel virus strain of novel infectious bronchitis serotypes, selected from the group consisting of culture Nos. CNCTC A 07/80, CNCTC A 08/80, CNCTC A 09/80, CNCTC A 010/80, CNCTC A 011/80, CNCTC A 013/80, CNCTC A 014/80, CNCTC A 015/80 and CNCTC A 016/80 deposited at the Czechoslovak National Collection of Type Cultures of the Institute of Hygiene and Epidemiology in Prague, Czechoslovakia and the novel viruses per se, combined virus vaccaines and a novel method of protecting poultry from infectious bronchitis.