The positive rate of antibodies in human to Lj and Lf were the highest, to Lp6 the next, and to Lp 1,2,4,5,7,8,9,10 the lowest.

• 人群抗体阳性率以Lj和Lf最高,Lp6次之,Lp1、2、4、5、7、8、9、1O最低。 四种职业人群中,奶牛场职工阳性率最高。