摘要
本文对某农场688只白痢康复鸡的种用及经济价值进行的评价结果为,日产蛋率比发病前正常水平降低了12.3％,蛋的受精率降低了5.1～8.1％,孵化率降低了18.9％;全血平板凝集试验、血清琼脂扩散及卵黄琼脂扩散反应的阳性率分别为92.5％、90.0％和84.0％。从这些康复鸡所产的鲜蛋,入孵后7日龄和21日龄的死胚以及后代死雏中均分离出鸡白痢沙门氏菌,检出率依次为8.0％(2/25)、16.6％(5/30)、53.3％(16/30)和77.7％(7/9)。为此,该鸡群显然不能留作种用,其继续喂养的经济价值亦低,建议于产蛋期后全部淘汰。
Estimation on breeding and economic values of 688 converlescent chickens of pullorum disease was conducted. The rate of egg production, fertility and hatchability reduced 12.3%, 5.1-8.1% and 18.9% in order of priority, comparing- with the normal level before infection. The rate of positive reactors of testing chickens from blood plate agglutination test,serum agar gel precipitation, yolk ager gel precipitation were 92.5%, 90.0% and 84.0% respectively. Furthermore, S. pullorum was isolated from eggs, dead embryo of 7-day and 21-day hatched eggs and effected progeny. athogen isolating rates were 8.0% (2/25), 16.6% (5/30), 53.3% (16/30) and 77.7% (7/9) from preceding materials respectively. Observiously these'birds couldn't be used for breeding. And it wasn't worth to rear them continuously in economic estimation.
出处
《贵州农业科学》
CAS
1991年第3期41-44,共4页
Guizhou Agricultural Sciences
关键词
鸡
白痢
防治
经济价值
pullorum disease
blood plate agglutination test
serum agar gel precipitation
yolk agar gel precipitation
