肺结核病的化学治疗的疗效因结核菌耐药性的产生,而大受影响。因而对于已耐二种或二种以上主要抗结核药物的复治病例,往往需更换治疗方法,其中包括二类药物的应用。1959年以来我们采用以二类药物为主方法,圜丝氨酸—异菸肼,氨硫脲—土霉素治疗71例经过较长期第一类药物治疗无效的复治肺结核病,收到一定疗效。现介绍如下: The efficacy of chemotherapy for tuberculosis is greatly affected by the emergence of drug-resistant TB. Therefore, patients who have already resisted retreatment of two or more major anti-tuberculosis drugs often need to change treatment methods, including the application of two types of drugs. Since 1959, we have adopted a second-class drug-based approach, serine - isoniazid, ammonia thiourea - oxytetracycline treatment of 71 cases of longer-term first-class drugs ineffective treatment of pulmonary tuberculosis, received a certain effect. Now introduced as follows: