【摘要】 通过对鸡新城疫的流行特点、临诊诊断、剖检变化及血清抗体的测定证实饮用NDiv系苗后引发了鸡新城疫感染,并从ND基因型变化及免疫抑制等多方面分析了ND发生的原因,并提出了相应的防制对策。更多还原

【Abstract】 This paper has verified that infection of NDV in chicken after having used NDiv vaccine by drinkingwater route by epizootiology, clinical examination, gross lessions and detection of serum antibody titre(HI),and analyzed the reason of infection of NDV in chicken through variety of gene serotypes and immunoinhibition etc, and provided a series of approaches and prospects of control. 更多还原