Positive results were found in 8 out of 50 by sputum acid-fast staining, 73 out of 86 by bronchoscopic brushing smears, and 17 out of 56 by bronchial biopsies.

• 纤支镜检查示38%25的病例有炎症浸润型病变，9%25有增殖型病变，26%25有狭窄闭塞型病变，17%25有溃疡型病变，11%25大致正常。