Metchnikoff-Schaumann bodies in experimental Yersin's type tuberculosis induced with Mycobacterium avium in hamster

Structure and ultrastructure of Metchnikoff-Schaumann bodies occurring in macrophages, epithelioid cells and multinucleated giant cells in tuberculous granuloma were investigated. Their similitude with other reported intracellular calcareous bodies occurring in malakoplakia, infectious orchitis (Michaelis-Guttman' bodies or calcosphaerites), in beryllium granulomas (conchoid bodies) and sarcoidosis (Schaumann bodies) is discussed.