母鸡输卵管畸形发生原因的分析

某种鸡场一群艾维茵父母代种鸡中出现“假性母鸡”,剖检发现输卵管畸形。这批种鸡在17日龄时发生过某传染病。进行发病情况调查、对病死雏鸡的剖检和开产期病死母鸡的剖检、病料鸡胚感染和传代试验及新城疫病毒干扰试验。结果,鸡胚感染中第3代出现侏儒胚,干扰组的新城疫血凝价均低于20,对照组新城疫血凝价高于40。综合分析,可以判定该雏鸡在3周龄发生的疾病是鸡传染性支气管炎,以及可以确定该鸡群中不少鸡只出现输卵管畸形是由鸡传染性支气管炎病毒早期感染而引起的。

Inquiring into the Causes about Malformation in Oviduct of Hens

The false hens from a flock of Avian parents breed were dissected in a certain chicken farm, and malformation appeared in each oviduct. Some chickens of the flock were infected a certain pathogenic microorganism at 17-day-old. The infectious state about the chicken and the condition about the false hens were investigated, the chickens died of the disease and were dissected, the hens died of certain disease and were dissected, test of infecting and going down to posterity and interfereing test to Newcastle disease virus were carried out in embryo of chicken. The results of these tests were that the infected embryos of third generation began to form dwarf embryos, and hemagglutination dose of umbilical liquid of chic-ken embryos were <20 in interfereing group, but the hemagglutination dose were >40 in contral group. The results could make synthetically known that the disease that had an attack to chickens at 3-week-old was avian infectious bronchitis, and oviduct malformation of some hens in the flock had something to do with that these hens were infected with avian infectious bronchitis virus at early stage.