The chicken inclusion body hepatitis virus could induce SPF chicken to synthesize TNF with the infection by mouth.

• 研究结果表明,鸡包涵体肝炎病毒经口腔感染SPF雏鸡可刺激机体产生TNF,在感染的不同日龄鸡的TNF活性出现一定的消长规律。