为探讨卡介苗接种后机体免疫力与结素反应之间的关系,我们对种卡和未种卡儿童作结素试验及种卡后早发反应观察。结果发现,曾种卡儿童结素试验阳性者和阴性有卡痕者,早发反应率分别为100％和93.48％;结素试验阴性无卡痕者为32.85％。未曾种卡结素试验阴性者,种卡后未见早发反应发生。说明,种卡后结素反应转阴,有可能是机体缺乏迟发型变态反应,而并非全为免疫力消失所致。 In order to explore the relationship between the immunity of body and the reaction of tuberculin after BCG vaccination, we carried out the experiment of endonuclease test and the observation of early onset reaction after seed card. The results showed that those who had a positive test card children with negative and those who have a sign of keloid, early reaction rates were 100% and 93.48% respectively, and those with negative kerosene were 32.85%. Have not seen the type of catenin test negative, no early onset of card after the occurrence of card. Description, after the end of seed card reaction turned negative, it may be the body lacks delayed-type allergic reactions, not all due to the disappearance of immunity.