Proventriculus type of avian infectious bronchitis isolate virus D971 was used to infect SPF chickens.Infected chickens manifested emaciation, diarrhea and mild dyspnea after inoculation.

• 摘要鸡传染性支气管炎病毒D971分离株感染SPF鸡后主要表现为消瘦、稀便、伴有轻微的呼吸症状；