Morphology 



583 



THE SPIRILLUM or DENECKE (SPIRILLUM TYROGENUM) 



Another organism with a partial resemblance to the cholera spirillum was 

 found by Denecke* in old cheese. 



Fig. 243. Spirillum of Denecke, from an agar-agar culture. X 1000 (Itzerott 



and Niemann). 



Morphology. Its form is similar to that of the cholera spirillum, the shorter 

 individuals being of equal diameter throughout. The spiral forms are longer 



Fig. 244. Spirillum of Denecke; gelatin puncture cultures aged forty-eight and 

 sixty hours (Shakespeare). 



than those of the Finkler and Prior spirillum, and are more tightly coiled than 

 those of the cholera spirillum. 



* "Deutsche med. Wochenschrift," 1885. 



