这一问题曾在第十四届国际防痨会议的一次座谈会上进行讨论,茲将各国学者的意见作如下的报导:结素试验在选择卡介苗接种对象上的价值接种卡介苗前结核菌素试验的目的,在于选择未受结核菌自然感染的对象,因为已受自然感染的人接种卡介苗并不能增进其抵抗力,有时甚至还可以引起不良的反应。过去总以为结核菌素试验是鉴别已否受结核菌自然感染的一个简便方法,实际使用时,总是先用低浓度的结核菌素进行试验,如为陰性,再用高浓度的结核菌素进行第二次试验,认为只要对结核菌素有敏感反应,便可 This issue was discussed at a symposium held at the 14th International Conference on Narcotics. The views of scholars from various countries are hereby reported as follows: The value of end-use testing in choosing the target of BCG vaccination Pre-BCG tuberculin test The aim is to choose those who are not naturally infected with Mycobacterium tuberculosis because naturally infected individuals who have been vaccinated against BCG do not increase their immunity and can sometimes even cause adverse reactions. In the past, the tuberculin test was always considered as a simple way to identify whether a natural infection by Mycobacterium tuberculosis has been carried out. In actual use, always test with low concentrations of tuberculin. If negative, reuse high concentrations of tuberculin The second test, that as long as the tuberculin sensitive reaction can be