我们曾用OT和SK-SD作抗原,对73例伤寒患者的皮肤迟发型变态反应进行了观察,发现伤寒患者的非特异性细胞免疫功能明显低下,与正常人相比有显著差异。1979年以来,我们又用广州医药工业研究所生产的植物血凝素(PHA)作刺激原,对42例伤寒患者的皮肤反应进行了动态观察,观察的对象全部为确诊病例,男23例,女19例,平均年令 We used OT and SK-SD as antigens to observe the delayed skin allergy in 73 patients with typhoid fever. We found that non-specific cellular immune function of patients with typhoid fever was significantly lower than that of normal people. Since 1979, we also used the Phytohemagglutinin (PHA) produced by Guangzhou Institute of Pharmaceutical Industry as the stimulator to observe the skin reactions of 42 typhoid fever patients. All the objects were confirmed, including 23 males, 19 females, the average annual order