流行病学研究表明，哮喘儿童发生支气管炎症状的增多与长期接触二氧化氮有关。
Epidemiological studies have shown that symptoms of bronchitis in asthmatic children increase in association with long-term exposure to NO2.
目的探讨原发性支气管肺淀粉样变的流行病学、诊断、治疗和预后。
Objective To discuss the epidemiology, diagnosis, treatment and prognosis of primary bronchial and pulmonary amyloidosis.
鸡自然发生的鸡肾病变型传染性支气管炎病例，进行了流行病学及病理变化方面的检验。
The epidemiology and pathological changes about the case of naturally infected by nephropathogenic infectious bronchitis viruses were examined.
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