采用单向琼脂免疫扩散法，测定Zmu-1：DHP品系豚鼠的血清IgG含量。从15～70日龄起，血清IgG水平逐渐递增，70日龄后趋于平稳或稍有下降。血清含量的变异系数随日龄增加而递减。该品系豚鼠常用日龄（35d）或体重（300g）的血清IgG正常值为5.37mg/ml。在不同日龄IgG的含量与性别一般无关。Zmu-1：DHP品系豚鼠血清IgG含量水平与其他品系比较，具有稳定的变化规律，个体间差异较小，说明该品系豚鼠的遗传性和免疫反应性较为一致。

The level of serum IgG in conventional Zmu-1： DHP guinea pig was detected by single radial immunodiffusion. The level was increased with age from 15-70 days, and tended to be steady or declined slightly thereafter. The level of serum IgG of the strain at the age of 35 days (about 300 g body weight) was 5.37 mg/ml. Generally there was no significant difference in sex. As compared with the purchased strain, the level of serum IgG of Zmu-l. DHP guinea pig had a more steady pattern and a less difference among individuals.