北京某养鸽场1987年9至10月,从外地引进3批肉用种鸽,1987年11月至1988年1月场里先后有5人突然发生以发烧、咳嗽、咽痛、胸痛为特征的类感冒样疾病,发病率为25％。1988年3月始,鸽场出现雏鸽发病和死亡现象,4月出现成批雏鸽(15～30日龄)发 A breeding pigeon in Beijing From September to October 1987, three batches of meat pigeons were introduced from the field. From November 1987 to January 1988, there were 5 sudden onset of fever, cough, sore throat and chest pain in the field Of influenza-like illness, the incidence was 25%. Since the beginning of March 1988, pigeon emergence and death occurred in pigeon fields. In April, a number of young pigeons (aged 15-30 days)