1　结核病的发病结核病由感染到发病往往有一个较长期、慢性的过程,短到3个月,长则几年甚至几十年。人体感染结核杆菌之后往往只是少数人(5 %～10 % )发病,这主要取决于所感染结核杆菌的毒力、数量,对结核杆菌的易感程度及个体免疫差异等。随着现代医学的快速发展,结核细菌学、 The incidence of tuberculosis Tuberculosis from infection to infection often have a longer, chronic process, as short as 3 months, as long as a few years or even decades. Mycobacterium tuberculosis infection is often only a small number of people (5% to 10%) incidence, which depends on the virulence of M. tuberculosis infection, the number of susceptible to Mycobacterium tuberculosis and individual immune differences. With the rapid development of modern medicine, tuberculosis bacteriology,