“…In some of these tropical regions the antigen is more often found in patients with lepromatous leprosy (particularly young males) than in patients with tuberculoid leprosy or in non-leprosy controls from the same region (Blumberg, Melartin, Lechat, and Guinto, 1967b;Blumberg, Friedlaender, and Woodside, 1969a (Blumberg, Melartin, Guinto, and Werner, 1966;Blumberg, Melartin, Guinto, and Lechat, 1969b (Blumberg and Riddell, 1963;Blumberg et al, 1966). The antiserum used was rabbit antiserum no.…”