The complement fixation reaction was made on lepra serum with Lecithin and Kephalin both of which had been extracted from leproma and murine leprosy granuloma with the following results:
1) Lecithin showed about the same positive percentage (35.3%) of yolk Lecithin.
2) Kephalin showed 17-24% lower rate than ox-brain Kephalin posive rate (68.0%).
3) Ox-brain Kephalin had a priority as a non-specific reaction antigen. Kephalin of lepra tissue was of little value.
4) For a rabbit immune serum of Mycobacterium leprae, Lecithin, Kephalin from leproma had a higher positive rate than that from murine leprosy granuloma, for rabbit immune serum of Mycobacterium leprae murium Lecithin, Kephalin from murine leprosy were higher than that from human leprosy.
5) Kephalin showed a higher positve rate than Lecithin.
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