Antigens used to vaccinate mice.

Ranking of efficacy on a range from − to +++ was based on weight loss and nasal colonization of mice challenged with S. equi after vaccination with indicated antigens.

疗效评级以-至+++为等级区间，其评定依据为：采用指定抗原免疫小鼠后，对小鼠进行马链球菌（Streptococcus equi）攻毒，以该小鼠的体重减轻程度与鼻腔定植状态作为评级指标。