Detection of Mycobacterium Tuberculosis DNA in the Skin Lesions of Patients with tuberculosis verrucosa cutis

Applying PCR technique to detect mycobacterium tuberculosis DNA in the skin lesions of ten patients with tuberculosis verrucosa cutis.The history of all patients is above two years.The results showed that only one skin lesion was positive detected in ten patients and three patients were positive detected in four patients with lymphoid tuberculosis as posivive controls and tow normal skin lesions as negative controls were all negative.The results indicate that the mycobacterium tuberculosis was seen only occasionally in the skin lesion of tuberculosis verrucosa cutis in late stage.