一.介绍自从 Felix 氏和 Topley 氏等对伤寒病的肥达氏反应作了定性分析后,发现在大多数伤寒患者的病程中,鞭毛和菌体抗体的滴度都有增加,而在正常人经过预防接种后,虽二种抗体也都增加,但其体内的菌体抗体并不如鞭毛抗体一样持久,绝大多数是注射后六个月消失。所以在伤寒菌普遍接种的今日,这 I. Introduction Since Felix’s and Topley’s qualitative analysis of Widal’s reaction to typhoid fever has found that the titer of flagella and bacterial antibody increased during the course of most typhoid patients, After vaccination, although the two antibodies also increased, but the body of the antibody in the body is not as long as the flagellar antibody, the vast majority of the disappearance of six months after injection. So in the common vaccination of typhoid fever today, this