植物血凝素(简称PHA)皮肤试验是测定机体细胞免疫功能的方法之一。经皮肤注射后可刺激皮肤局部淋巴细胞发生转化,释放一系列淋巴因子,吸引炎性细胞在局部皮肤浸润发生的迟发超敏反应,表现局部皮肤红肿,在一定程度上可以反应机体细胞免疫功能。本法简便,药源易得,副作用少。近年来,有关 Phytohemagglutinin (PHA) skin test is one of the methods to determine cellular immune function. Transdermal injection can stimulate local skin lymphoid transformation, release a series of lymphokines, attract inflammatory cells in the local skin infiltration of delayed hypersensitivity, the performance of local skin irritation, to some extent, can reflect the body’s cellular immune function . This method is simple, easy to obtain medicine, fewer side effects. In recent years, relevant