Positive results were found in 8 out of 50 by sputum acidfast staining , 73 out of 86 by bronchoscopic brushing smears , and 17 out of 56 by bronchial biopsies .
Methods : Morning sputum direct smear for 3 times , morning sputum tuberculosis bacillus culture , and induced sputum centrifugation sediment smear for acidfast bacillus were performed on 50 patients with pulmonary tuberculosis .
方法：对50例肺结核患者分别进行晨痰直接涂片3次、晨痰结核菌培养、诱导痰离心沉淀涂片查找抗酸杆菌。
Conclusions : It is concluded that induced sputum centrifugation sediment smear looking for acidfast bacillus has the advantages of high positive rate and few side effects . It has important significance for clinical diagnosis of pulmonary tuberculosis and epidemiological investigation and can be recommended to be used in grassroots hospitals .
Induced sputum centrifugation sediment smear looking for acidfast bacillus was positive in 20 patients ( 20 / 50,40 % ) . Its positive rate was significantly higher than that of bacterial culture and direct sputum smear ( all P < 0 05 ) . Six patients discharging a large mumber of tuberculous bacilli ( + + + + ) were detected by induced sputum centrifugation sediment smear ( 6 / 20 ) .
