“…CLOSTRIDIUM PILIFORME -TYZZER'S DISEASE (Fujiwara and Ganaway, 1994;Ganaway, 1982;Ganaway et al, 1971;Percy and Barthold, 2007) Etiology Tyzzer's disease is named for Ernest Tyzzer, who first described it in a colony of Japanese Waltzing mice. The causative organism, C. piliforme (formerly Bacillus piliformis), is a long, thin, gram-negative spore-forming bacterium that appears to require living cells for in vitro growth.…”