肺结核是一种慢性传染病。它的发展过程很长,结核菌侵入肺部后,至少要经过十个星期,它的病灶才能够在X线照片上显示出来。肺结核的病理机制和一般炎症相同,但是它具有两个特点:一是结核性肉芽组织即结核结节。一是干酪样坏死。肺结核炎症是人的整个机体受结核菌刺激而产生的复杂反射性反应。它的病变包括病灶本身和病灶周围炎。结核性炎症反应可以分作两个阶段:第一个阶段是急性进行性病变,第二个阶段是慢性退行性病变。结核性炎症的第一个阶段 Tuberculosis is a chronic infectious disease. Its development takes a long time. After TB has invaded the lungs for at least 10 weeks, its lesions can be displayed on X-rays. The pathological mechanism of tuberculosis and general inflammation the same, but it has two characteristics: First, tuberculous granulation tissue that nodules. First, caseous necrosis. Tuberculosis inflammation is the complex reflex response of the entire body of a person stimulated by Mycobacterium tuberculosis. Its lesions include the lesion itself and the inflammation around the lesion. Tuberculous inflammatory reaction can be divided into two stages: the first stage is acute progressive disease, the second stage is chronic degenerative disease. The first stage of tuberculous inflammation