372 



SPECIFIC MICRO-ORGANISMS 



, In 1915, Futaki and Takaki^ found a spirochete apparently 

 identical with Spirochata muris in rat-bite fever (Sodoku) of man. 

 To the organism they gave the name Spirochata morsus-muris , 



Pig. i4S.—Spirochceta (morsus) muris in lung of mouse inoculated with blood 

 from human rat-bite fever. Silver impregnation. X 1500. {After Futaki, Takaki, 

 Taniguchi and Osumi.) 



The disease assumed some imp''ortance in the armies during the 

 period of trench warfare. It is transmissible to various animals, 



Pig. 146. — Spirochata (morsus) muris in blood of guinea-pig with experimental- 

 rat-bite fever. Giemsa's stain, x 1250. (After Futaki and associates.) 



t 



the guinea-pig being perhaps most satisfactory for study of the 



experimental disease. 



' Futaki, Takaki, Taniguchi and Osumi: Journ. Exp. Med., 1916, 23, p. 249; 

 ibid., 191 7, 25, p. a- 



