肺结核在青少年人群中容易发生,痰菌阳性的肺结核患者是很重要的传染源。世界卫生组织把印度、中国、俄罗斯等22个国家列为结核病高负担、高危险的国家。我国年感染率0.72%,全国约5.5亿人曾受到结核病的感染[1],而随着环境质量的逐渐恶化,人们抵抗力的日趋下降,流动人员的日益 Tuberculosis is more likely to occur in adolescents, and sputum-positive tuberculosis patients are an important source of infection. WHO lists 22 countries such as India, China and Russia as high burden and high risk countries for tuberculosis. In our country, the annual infection rate is 0.72%, and about 550 million people in the country have been infected with tuberculosis [1]. With the gradual deterioration of environmental quality, people’s immunity is declining day by day, and the growing mobility of people