2.S8 



BACTERIOLOGY. 



Spirillum Finkleri (Comma-bacillus in Cholera 

 nostras). Curved rods thicker than the comma- 

 bacillus of Koch, and spirilla. The colonies on 

 plate-cultivations (Plates VI. and VII.) are very 

 much larger than those of the comma-bacillus of 



Koch of the same age. 

 They have the faintest 

 yellowish-brown tinge, 

 a well-defined border, 

 and a distinctly granu- 

 lar appearance. They 

 liquefy nutrient gela- 

 tine very rapidly, so 

 that the first plate of 

 a series is, as a rule, 

 completely liquefied 

 on the day following 

 inoculation, and the 

 second plate in two or 

 three days more. In a 

 test-tube cultivation in 

 nutrient gelatine the 



Fig. 95. Fig. 9 6. appearances are espe- 



cially characteristic ; 

 the gelatine is very 

 rapidly liquefied along 

 the whole track of the 

 needle, so that the cultivation resembles a conical 

 sack, or the finger of a glove turned inside out 

 (Figs. 95 and 96). On a sloping surface of nutrient 





PURE CULTIVATIONS OF THE SPIRILLUM 

 FINKLERI IN NUTRIENT GELATINE. 



Fig. 95. In twenty-four hours. 

 Fig. 96. In thirty-six hours. 



