| 摘要 |
<p>Infectious bronchitis vaccines for poultry derived from at least one virus strain of a novel serotype of the infectious bronchitis virusses, identified by the internal indications Utrecht.101, Utrecht.102, Drente.201, Limburg.501, Limburg.502, Limburg.503, Brabant.801, Limburg.536, Overijssel.728 and Utrecht.121, which have been deposited with the Czechoslovak National Collection of Type Cultures of the Institute of Hygiene and Epidemiology under the numbers: CNCTC A 07/80, CNCTC A 08/80, CNCTC A 09/80, CNCTC A010/80, CNCTC A 011/80 CNCTC A 012/80, CNCTC A 016/80, CNCTC A 014/80, CNCTC A 015/80 and CNCTC A 013/80; combined infectious bronchitis vaccines, derived from the IBV-H120 or the IBV-H52 of the Massachusetts type strain, in addition to one or more of the beforementioned strains and the infectious bronchitis virus strains themselves; a process for the preventing of infectious bronchitis with poultry by vaccination with the vaccine, derived from the beforementioned strains. Preferably infectious bronchitis vaccines are derived from the virus strains Utrecht.101, deposited under nr. CNCTC A 07/80, Limburg.536, deposited under nr. CNCTC A 014/80 and Overijssel.728, deposited under nr. CNCTC A 015/80; preferably the live infectious bronchitis vaccines are prepared, which are containing a virus content of ? 104.0 EID50 pro dosage of each of the virus strains after freeze drying.</p> |
