Abstract: Objective To assess the efficacy of 6-month uniform multidrug therapy in various types of leprosy. Methods A field trial was conducted among 166 patients with different types of leprosy. All patients were treated with uniform multidrug therapy for 6 months, then followed up for 2 years. Clinical and bacteriological improvements were evaluated. Results Among the 166 patients, 31 dropped out due to various reasons, and 135 completed the 6-month treatment and 2-year follow-up. Among the 135 patients, 45 （33.3%） were skin smear negative, and the other smear-positive 90 had an average bacterial index （BI） of 2.91 ± 1.45 （range: 0.1 - 6.0） before treatment. At the end of the 2-year follow-up, the 45 skin smear-negative patients showed 93.3% improvement in skin lesions and 80.0% improvement in nerve impairments, and the smear-positive 90 patients showed 95.6% improvements in skin lesions and 77.8% improvement in nerve impairments. Skin smear turned negative in 49 （54.4%） out of the smear-positive 90 patients with the average BI declining to 0.66 ± 0.99. The annual decrease in BI reached 0.9 during the first 2.5 years after the beginning of treatment. Twenty-five patients developed leprosy reaction during the follow-up, including 13 cases of type I leprosy reaction and 12 cases of type II leprosy reaction. Relapse was noted in 1 patient with multibacillary leprosy 13 months after the termination of treatment. Conclusions The short-term efficacy of uniform multidrug therapy is similar to that of 2-year treatment with routine multidrug therapy. However, further studies are required to survey the incidence of leprosy reaction and relapse in patients treated with uniform multidrug therapy.

Key words: recurrence