4o6 



:\nCRO-ORGAXISMS AND DISEASE [chap. 



Similarly, some of the bacilli of protcus vulgaris, of 

 cliijlitheria, and of glanders are of a curved shape, but they 

 do not form S-shaped forms or spirilla. Cohn i has de- 

 scribed a number of vibrios and spirilla occurring in various 

 decomposing fluids. 



((?) Vibrio nigula consists of rods of about S to i6 /x in 

 length, and curved either like a C or hke an S. They are 

 single, or form chains of two. Their protoplasm is always 

 slightly granular. They are found in putrefying organic 



Fig. 162. — ViKRio RuGUL.\ 

 (after Cuhn). 



'('' 





i 



Fig. 163. — ViF.Rio Serpens, 



ISUL.\TED (AFTER COH.\). 



substances, and often form continuous masses, the indi- 

 viduals interlacing in all directions. 



(/') Vibrio serpens. — This is also a septic organism, much 

 thinner and longer than the previous one, more wavy, as a 

 rule, curved into a single or double wave. The length 

 varies between 11 and 25 /x. It is motile; and also 

 forms continuous masses, the individuals interlacing in all 

 directions. 



(f) Spirillum tenue. — This is much finer and more wavy 

 than vibro serpens, the turns being closer together and 



-* Bcitrdgc z. Biol. d. P/lanzcn, vol. ii. 



