ABSTRACT
1- Of ten patients, with various dermatoses, attending the outpatient clinic at New York Skin and Cancer Hospital, all reacted positively to tuberculin. Of this group 9 showed early and 8 late positive reactions to lepromin. 2- Of four patients with Boeck´s sarcoid, three reacted negatively to tuberculin and to lepromin. The fourth was weakly positive to tuberculin, negative to lepromin on the early reading but did develop a positive Mitsuda reaction. 3- Of 108 tuberculous patients at Seaview Hospital, 70.4 per cent were positive to lepromin on the early reading and 46.2 on the late reading. This high proportion of Fernández positives may be due to the fact that all individuals were tuberculin positives. If so, comparative figures for Mitsuda positives would indicate that the Mitsuda reaction is less affected by consensitization with m. tuberculosis than is the Fernández reaction.
