虽然结核病的流行在北美和西欧已经大为减少,但结核病在世界一些仍然存在贫困和拥挤的地区依旧是主要的健康问题。卫生条件、生活水准、早期发现及治疗方面的改善已促成本病发病率下降。例如,1900年,美国每100,000人口由结核病引起大约200人死亡,而1973年每10万人口的病死数则下降到1.8人。过去被指定专门治疗结核病的疗 Although the prevalence of tuberculosis has diminished in North America and Western Europe, tuberculosis remains a major health problem in some parts of the world where poverty and congestion still persist. Improvements in hygiene, quality of life, early detection and treatment have led to a decrease in the incidence of this disease. For example, in the United States, about 200 deaths per 100,000 population were caused by tuberculosis in 1900, while the number of deaths per 100,000 population dropped to 1.8 in 1973. In the past was designated to treat tuberculosis specifically