The antibody levels in milk of cows immunized were detected by In vitro Agglutination and Reverse Indirect Hemagglutination Inhibition Test and their changes were described.

• 然后定期采乳,分别以试管凝集反应和反向间接血凝抑制试验检测大肠杆菌抗体和轮状病毒抗体,并比较这两种不同免疫方式免疫奶牛乳中抗体的消长规律。