Abstract
The anaerobic decompositions of uric acid, xanthine, hypoxan-thine and guanine are brought about by highly specialized spore-forming bacteria which appear to be widely distributed in nature. 12 out of 13 strains isolated from soil were placed in Clostridium acidi-urici; one strain was descr. as C. cylindrosporum. The influence of various environmental and nutritional factors upon the growth of these organisms was investigated and satisfactory culture media are described.