The infection rate of Bacillus tuberculosis is adscendent tendency in the lately years,especially increased in patients of immunocompromised hosts. Controlling of tuberculosis will be faced with severe challenges.

• 结核杆菌的感染率呈逐年上升趋势,尤其是免疫功能受损或低下患者的感染率明显上升,结核病的防治将面临严重的挑战。