Tuberculosis is an infectious disease of the lungs caused by infection with Mycobacterium tuberculosis. According to different pathological changes and X-ray manifestations, the 1978 National Conference on Tuberculosis Control and Prevention classified tuberculosis into the following five major types: 1. primary tuberculosis, also known as type I tuberculosis, refers to the initial infection with tuberculosis bacilli that causes the disease, including primary syndrome and bronchiolo-lymphatic tuberculosis. 2. hematogenous disseminated type Tuberculosis, also called type II tuberculosis, which includes acute granulomatous tuberculosis, subacute or chronic hematogenous tuberculosis, mainly in the body has a certain degree of immunity, due to a small number of tuberculosis bacilli repeatedly invade the blood circulation caused by. 3, also called type III tuberculosis, also known as infiltrative type of tuberculosis, is one of the most common clinical type of tuberculosis, adult tuberculosis is predominant in this type, accounting for about 80% of the tuberculosis. 4, also known as type III, also called infiltrative tuberculosis, is a clinical type, adult tuberculosis, this type of tuberculosis, accounting for about 80% of the tuberculosis. About 80%. 4, also called type IV tuberculosis, called chronic fibrous cavity type tuberculosis, is the clinical manifestation of tuberculosis disease in the late stage. 5, common clinical tuberculosis with pleural fluid, called tuberculosis pleurisy, also called type V tuberculosis, is the pleura infected with tuberculosis and tuberculosis allergic reaction caused by the bacteria, is divided into dry pleurisy and exudative pleurisy changes.