由传染性肺结核患者喷出的含有结核分枝杆菌的飞沫悬浮微粒传播给暴露的接触者后,1%~2%的接触者不久患活动性结核病,1/3接触者成为潜伏感染者,其中10%的潜伏感染者可在其一生中任何时候发生结核病,另近2/3的接触者没有被结核分枝杆菌感染[1]。现已公认痰涂片阳性患者是主要的传 About 1% to 2% of contacts soon develop active tuberculosis after contact with Mycobacterium tuberculosis-containing droplets of aerosol aerosol from patients with infectious tuberculosis spread to exposed contacts, and one-third of the contacts become latent infected, Of these, 10% of those who are latent can develop tuberculosis at any time during their lifetime, and nearly two-thirds of those who have not been infected by M. tuberculosis [1]. It is now recognized that sputum smear-positive patients are the main transmission