Kwapinski, Jerzy B. (South African Institute for Medical Research, Johannesburg), and Marshall L. Snyder. Antigenic structure and serological relationships of Mycobacterium, Actinomyces, Streptococcus, and Diplococcus. J. Bacteriol. 82:632–639. 1961.—Chemical fractions, 72 in all, from four strains of Mycobacterium, four strains of Actinomyces, and four strains of Streptococceae, were tested in homologous and heterologous antisera prepared against intact cells and chemical fractions of Mycobacterium tuberculosis.