35'2 BACTERIOLOGY. 



almost complete decolorization in from three to four 

 days at 37° C, with coincident coagulation of the 

 casein and the formation of a layer of clear whey 

 above it. 



It causes the red color of rosolic-acid-peptone solu- 

 tion to become somewhat intensified after four or five 

 days at 37° C. 



Of twenty-one animals treated with this organism 

 by Koch's method of inoculation only four died. 



VIBRIO MBTCHJSriKOVI. 



The spirillum that simulates very closely the comma 

 bacillus of cholera in its morphological and cultural 

 peculiarities, but which is still easily distinguished from 

 it, is that described by Gamaleia under the name of 

 vibrio Metchnikovi. It was found post-mortem in a 

 number of fowls that had died in the poultry market 

 of Odessa, and the experiments of the discoverer de- 

 monstrate that it is related etiologically to the gastro- 

 enteritis with which the chickens had been sufiering. 



Fig. 73. 



. ■» ---^^ tj 





Viiino Metchnikovi from agar culture, twenty-four hours old. 



In morphology it is seen as short, curved rods and 

 as longer, spiral- like filaments. It is usually thicker 

 than Koch's spirillum and is at times muoh longer, 



