SPIRILLUM FINKLERI 



SPIRILLUM AVICIDUM (METCHNI- 



KOVII) 

 SPIRILLUM TYROGENUM (DENEKE) 



THE three varieties of Spirilla which are illus- 

 trated in the following photographs are chiefly- 

 interesting in connection with the difficulty expe- 

 rienced in establishing the specific character of the 

 Cholera Spirillum (Koch). 



The Spirillum Finkleri was isolated by Finkler of 

 Bonn. It presents morphological characters ex- 

 tremely like those of the true Cholera Spirillum, 

 but is usually shorter and thicker, and less readily 

 gives rise to spirilla forms, though it is a true spiril- 

 lum. It is an extremely variable organism forming 

 coccoid, spindle and other forms, and has in con- 

 sequence been called Vibrio Proteus (Buchner). 

 (Fig. 83). 



Its culture in gelatine resembles that of Koch's 



