CHARACTERIZATION OF AN INFECTIOUS-BRONCHITIS VIRUS ISOLATED FROM VACCINATED BROILER BREEDER FLOCKS

被引:68
作者
PARSONS, D [1 ]
ELLIS, MM [1 ]
CAVANAGH, D [1 ]
COOK, JKA [1 ]
机构
[1] AFRC,INST ANIM HLTH,HOUGHTON LAB,HOUGHTON PE17 2DA,HUNTS,ENGLAND
关键词
D O I
10.1136/vr.131.18.408
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
Four apparently serologically closely related isolates of infectious bronchitis virus were obtained from two flocks of vaccinated broiler breeders, one mile apart, which were experiencing increased mortality and decreases in egg production. The isolates were serologically distinct from isolates previously described and capable of causing characteristic infectious bronchitis-like respiratory infection in young chicks. In one experiment, the H120 vaccine strain of the virus did not protect the trachea against challenge with the new isolates 21 days later.
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页码:408 / 411
页数:4
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