1979年全国结核病防治工作会议规定:“活动性未定”肺结核(即“可疑活动性”)病例的胸片显示病变活动性难以确定.且痰菌阴性,列为Ⅱ组,登记建卡,并作患病率统计,治疗观察半年再行定组。为提高对“活动性未定”(以下简称未定)肺结核病例的认识,我们对1979年结核病流行病学抽样调查中湖北省发现 The National Conference on Tuberculosis Prevention and Control in 1979 stipulated that chest radiographs of cases of “undetermined activity” of tuberculosis (ie, “suspicious activity”) showed that it was difficult to determine the activity of the disease and sputum negative, which was classified as Group Ⅱ and registered for card construction. Prevalence statistics, treatment observation six months and then set. In order to raise awareness of cases of “undetermined activity” (hereinafter referred to as undetermined) cases of tuberculosis, we found that in the epidemiological survey of tuberculosis in 1979, Hubei Province