CHAPTER XXXIV. 
SPIRILLA RESEMBLING THAT OF CHOLERA—THE 
SPIRILLUM OF RELAPSING FEVER. 
SPIRILLUM OF FINKLER AND PRIOR. 
FINKLER and Prior, in 1884, obtained from the feces 
of patients with cholera nostras, after allowing the 
dejecta to stand for some days, a sprillum which is 
of interest mainly because it simulates the comma 
bacillus of Koch, but differs from it in several cultural 
peculiarities. 
Morphology. More or less curved rods with an aver- 
age length of 2.4 and a breadth of 0.4 to 0.6, some- 
what longer and thicker than the spirillum of Asiatic 
cholera and not so uniform in diameter, the central por- 
tion being usually wider than the pointed ends; forms 
sometimes S-shaped and spiral filaments, which are not 
as numerous, and are usually shorter than those formed 
by the cholera spirillum. Examined in the hanging 
drop they are seen to be actively motile. A single 
flagellum is attached to one end of the curved segments. 
In unfavorable media involution forms are common. 
Stains with the usual aniline colors. 
Biological Characters. An aérobic and facultative 
anaérobic, liquefying spirillum. Does not form spores. 
Upon gelatin plates small, white, punctiform colonies 
are developed at the end of twenty-four hours, which 
