Hughes C S, Gaskell R M, Bradbury J M, Jordan F T, Jones R C
Department of Veterinary Pathology, University of Liverpool, Neston, South Wirral.
Vet Rec. 1991 Sep 21;129(12):258-60. doi: 10.1136/vr.129.12.258.
Field outbreaks of infectious laryngotracheitis in commercial chicken flocks in England and Wales between 1985 and 1988 were investigated. Material from 49 outbreaks was submitted to Liverpool University, and virus was isolated from 17 of them. The results of a questionnaire on each outbreak are described. Generally, the disease was of moderate severity, and mainly affected laying flocks; it occurred in birds of a wide age range but most of the outbreaks were in birds between 10 and 20 weeks of age. The disease was not seen more frequently at any particular time of the year, and there was no evidence of a common source of infection. Three of the affected flocks had recently been moved and were beginning to lay; these stresses may have caused the re-excretion of latent virus.
对1985年至1988年间英格兰和威尔士商业鸡群中传染性喉气管炎的田间疫情进行了调查。来自49起疫情的样本被提交给利物浦大学，其中17份样本分离出了病毒。描述了针对每起疫情的问卷调查结果。总体而言，该病严重程度中等，主要影响产蛋鸡群；发病鸡年龄范围广泛，但大多数疫情发生在10至20周龄的鸡。一年中任何特定时间该病的发生频率均未见增加，且没有证据表明存在共同感染源。其中三个受影响鸡群最近刚转移并开始产蛋；这些应激因素可能导致潜伏病毒再次排出。
