Shaw D P, Halvorson D A, Bergeland M E, Newman L J
Department of Veterinary Diagnostic Investigation, College of Veterinary Medicine, University of Minnesota, St. Paul 55108.
Avian Dis. 1991 Jan-Mar;35(1):235-40.
A broiler breeder operation experienced a sudden outbreak of high mortality in nine different houses of breeders at eight different locations. In the first house to be affected, the losses were mainly in the females, but later flocks had losses up to 6.4%, mainly in the males. Affected chickens ranged in age from 7 to 22.5 weeks. Multifocal areas of necrosis and vasculitis were found in skin, muscle, and internal organs. No involvement of the brain was identified, but many of the birds had uveitis. The outbreak lasted 3 weeks and ended without treatment. Neither infectious agents nor mycotoxins were identified.
一个肉鸡育种场在八个不同地点的九个不同鸡舍中突然爆发了高死亡率疫情。在首个受影响的鸡舍中，损失主要发生在母鸡身上，但后来的鸡群损失率高达6.4%，主要是公鸡。受影响的鸡年龄在7至22.5周之间。在皮肤、肌肉和内脏器官中发现了多灶性坏死和血管炎区域。未发现脑部受累，但许多鸡患有葡萄膜炎。疫情持续了3周，未经治疗就结束了。未鉴定出感染因子和霉菌毒素。
