摘要
1991年3月,贵阳市郊某鸡场饲养的产蛋鸡群出现产蛋锐减,日产蛋率从54.9％大幅度下降到8.9％,持续减蛋18天不见恢复,最后全群淘汰。本文从细菌、霉形体、病毒三个方面进行了病原的分离鉴定和血清学调查,结果表明该鸡群产蛋下降的主要病因是传染性支气管炎病毒和败血霉形体混合感染。
A drop fo egg production happened in laying flocks of a poutlry farm in the suburb of Guiyang in March. 1991. The rates of egg production dcereased from 54.9％ to 8.9％ in aperiod of 18 days. No recover of production was observed and all involved chickens were condemned at last. The pathogen isolation and serological investigation had conducted, including bacteria, mycoplasma and virus, in this research pragram. The results showed that the main pathogen was due to infection of bronchitis virus and mycoplasma golliseptium in laying flocks.
关键词
鸡群
产蛋率
病因
鸡
传染病
infectious bromchitis virus
mycoplasma gallisepticum
