Positive resultives were found in 9% by sptum acid-fast staining, in 91% by bronchoscopic brushing smears,and 30% by bronchical biopsies.

• 行抗酸染色检查痰涂片阳性率 9%25 ,纤支镜刷片阳性率91%25。 经纤支镜行活组织检查中有 30%25证实为结核。