职业尘源性支气管炎是由于长期吸入各种生产性粉尘所引起。是一种起病缓慢、逐渐加剧、诊断困难、发病率高、对劳动力影响很大的一种疾病。最后常常因并发感染、肺气肿、气喘综合征、慢性肺心病而死亡。认为慢性尘源性支气管炎是尘肺的亚种,认为它是尘肺的前期。 Occupational dust-borne bronchitis is caused by long-term inhalation of various productive dusts. Is a slow onset, increasing, difficult diagnosis, high incidence, a great impact on the workforce a disease. Finally, often due to concurrent infections, emphysema, asthma syndrome, chronic pulmonary heart disease and death. Chronic Dermatitis Bronchitis is considered a subspecies of pneumoconiosis, that it is the pre-pneumoconiosis.