Chemical Nature of a Substance which was extracted from Egg Yolk and reported by Yamane to be Growth-Stimulatory to Mycobacterium tuberculosis.

Yamane reported that a growth stimulatory substance to Mycobacterium tuber culosis was isolated in a crystalline form from egg yolk (Yamane, 1958). The present report deals with the chemical nature of this substance analyzing two different preparations provided by Dr. Yamane. It was elucidated that this substance was a triglyceride. The effect of this substance in the medium could not be confirmed by many authors (Committee for Media of Tubercle Bacilli, 1958).