548 APPLICATION OF METHODS OF BACTERIOLOGY 



It is supplied with a single flagellum at one of its extremi- 

 ties, and is therefore motile. 

 It does not form spores. 

 It is aerobic. 



FIG. 92 



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



Its growth upon gelatin plates is usually characterized, 

 according to Pfeiffer, by the appearance of two kinds of 

 liquefying colonies, one strikingly like those of the Finkler- 

 Prior organism, the other very similar to those produced 

 by Koch's comma bacillus, though in both cases the lique- 



FIG. 93 



Colony of microspira Metchnikovi in gelatin, after thirty hours at 20 to 

 22 C. X about 75 diameters. 



faction resulting from the growth of this organism is more 

 energetic than that common to the spirillum of Asiatic 

 cholera. After from twenty-four to thirty hours the medium- 

 size colonies, when examined under a low power of the 



