目前,临床上诊断肺结核主要依赖X线和痰找抗酸杆菌,而X线表现不典型或痰菌阴性、无痰的肺结核患者往往得不到及时诊断。本文探讨用PCR技术检测外周血结核菌DNA诊断肺结核的价值,现总结如下。临床资料1.一般资料　本组31例为1995年6月～1996年6月在本院就诊未经治疗的病例,其中 Currently, the clinical diagnosis of tuberculosis depends mainly on X-ray and sputum to find acid-fast bacilli, and X-ray atypical sputum or sputum negative, often without sputum in patients with pulmonary tuberculosis often not diagnosed. This article discusses the use of PCR detection of peripheral blood DNA of tuberculosis diagnosis of tuberculosis, are summarized as follows. Clinical data 1. General information 31 patients in this group for the June 1995 ~ June 1996 in our hospital untreated cases, of which