CHAPTER VII. 

 SPIRILLA RESEMBLING THE CHOLERA SPIRILLUM. 



The Finkler and Prior Spirillum. Somewhat similar 

 to the spirillum of cholera, and in some respects closely 

 related to it, is the spirillum obtained from the feces of 

 a case of cholera nostras by Finkler and Prior in 1884. 

 It is a rather shorter, stouter organism, with a more pro- 

 nounced curve, than the cholera spirillum, and rarely 

 forms the long spirals which characterize the latter. 

 The central portion is also somewhat thinner than the 

 ends, which are a little pointed and give the organism 

 a less uniform appearance than that of cholera (Fig. 81). 



t * . . :w% ?<*. wi> 



FIG. 8l. Spirillum of Finkler and Prior, from an agar-agar culture; x 1000 

 (Itzerott and Niemann). 



Involution-forms are very common in cultures, and occur 

 as spheres, spindles, clubs, etc. Like the cholera spiril- 

 lum, each organism is provided with a single flagellum 



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