产蛋鸡几种呼吸道病混合感染的诊治
TECHNICAL ADVISOR FOR ANIMAL HUSBANDRY（2010）
Abstract
1 大肠杆菌和支原体 病鸡精神萎靡,呼吸困难,鼻腔有粘液,呼吸湿性锣音,毛色暗淡无光泽,鸡粪稀而恶臭.体重和产蛋都有所下降,鸡群的后期死淘率明显增加. 剖检见气囊膜增厚,浑浊不清,干酪样物凝结.心外膜、肝脏表面及腹膜呈黄色,有纤维素性伪膜附着,胰腺和小肠浆膜出血.
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