SPIRILLUM TYROQENUM. 345 



ments, Finkler and Prior had 3 out of 10 animals, and 

 Koch 5 out of 15 animals so treated to die. 



The claim of Finkler and Prior that this organism 

 was related etiologically to cholera nostras has been 

 shown by subsequent work to have been unjustifiable. 



In 1885, 1886, and 1887 Franck' examined seven 

 cases that clinically presented the condition of cholera 

 nostras ; in none of these seven cases was the organism 

 of Finkler and Prior, which they claimed to be the 

 cause of the disease, found. In all cases the results 

 of bacteriological examination, in so far as the constant 

 presence of an organism that might stand in causal 

 relation to the disease was concerned, were negative. 

 Only the ordinary intestinal bacteria were found. 



spiriIjLUM tvrogenum (cheese spirillum of 

 deneke). 



Fig. 67. 







Deneke's cheese spirillum, spirillum tyrogenum. From agar culture twenty- 

 four hours old. 



Another spiral form, likewise forming short, comma- 

 shaped segments in the course of its growth (Fig. 67), 

 is that found by Deneke in old cheese. In morphology 

 this organism is a little smaller than Koch's spirillum. 



1 Zeitschrifl f. Hygiene, Bd. iv, p. 207. 



