All mice for test were divided into 6 groups, which were immunized with the above three CSVs, inactiviated whole bacteria vaccine (WBC) of Ah J 1 or Et 38 strain, and PBS respectively.

• 将它们与 Ah J-1和 Et3 8全菌灭活疫苗一同分别免疫小鼠 ,并设注射 PBS对照组 ,检测各组小鼠体液免疫及细胞免疫水平。