Ten local strain of Nephritic infectious bronchitis virus were selected and five standard IBV strains (M41. Greay Holte Aust-T and MA5) were used in the comparison test to detect the serology of the ten stains.

• 用鸡传染性支气管炎标准毒株M41、Gray、Holte、Aust－T株以及MA5，通过气管环组织培养中和试验，采用病毒固定、血清变量法，对山西主要养鸡区15个鸡场分离的10个毒株进行了血清学鉴定。