VIBRIO METCHNIKOVI. 



373 



c, d, Fig. 79.) Development and liquefaction along 

 the deeper parts of the needle-track are much more pro- 

 nounced than is the case with the "comma bacillus." 



FIG. 79. 



a 6 c d 



Stab culture of vibrio Metchnikovi in gelatin, at 18 to 20 C. 

 a. After twenty -four hours, b. After forty-eight hours, c. After seventy- 

 two hours, d. After ninety-six hours. 



Its growth on agar-agar is rapid, and after twenty- 

 four to forty-eight hours there appears a grayish deposit 

 having a tendency to take on a yellowish tone. 



On potato at 37 C. its growth is seen as a moist, 

 coffee-colored patch surrounded by a much paler zone. 

 The whole growth is so smooth and glistening that it 

 has almost the appearance of being varnished, 



17 



