M ethods to divide our hospital's lunger of recent years who have difficul t and p ositive phlegm smear phthisic into two groups(check group and cure group) and pr ocess random analysis.

对我院近年来难性肺、涂片阳性病人随分为两组(对照组组)。对照组化方案相同,组加用卷曲霉素,观察效。