The results indicated that the immunized chicken flocks were infected by highly virulent MDV.
结果表明：该免疫鸡群受到了MDV强毒攻击，发生了马立克氏病。
Egg futures have surged by as much as one-third since March, the sort of move that would be justified if investors believed China's chicken flocks were headed for an unfortunate fate.
自三月以来，鸡蛋期价已经飙升了三分之一。而只有投资者认为中国的鸡群即将遭遇灾难，这种涨幅才称得上合理。
Killing an infected chicken is still a big economic loss for many poor farmers and they are therefore often reluctant to abandon their flocks.
对许多贫困的农民来讲，扑杀染病鸡依然是一个很大的经济损失，因此他们不大愿意放弃其鸡群。
ORT strains were isolated from 466 chicken samples collected from Guangxi different commercial flocks with respiratory clinic signs by culturing on blood plates.
对广西不同商业鸡场、不同品种及不同日龄共466羽有呼吸道症状病鸡进行ORT的分离与鉴定，结果共分离出20株ORT；
ORT strains were isolated from 466 chicken samples collected from Guangxi different commercial flocks with respiratory clinic signs by culturing on blood plates.
对广西不同商业鸡场、不同品种及不同日龄共466羽有呼吸道症状病鸡进行ORT的分离与鉴定，结果共分离出20株ORT；
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