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.

对我来难治性肺结核、痰涂片阳性病人随分为两组(对照组和治组)。对照组化相同,治组加用卷曲霉素,观察效。