344 BACTERIOLOGY 



Pathogenesis. Subcutaneous and intramuscular inoculations of pigeons and 



guinea pigs fatal. 

 Habitat. Isolated from dejecta of cholera patients. 



3. Spirillum serpens (Mtiller) Winter 



Vibrio terpens Mtiller : Animalia infusoria, 1786. 



Spirillum serpens Winter: Die Pilze, 1884. Zettnow: Centralblatt f. Bakteriol., 



X, 689. 



4 

 Morphology . Bacilli rigid filaments, with 2-3 wave-like undulations, 0.8-1.0: 



10-30 fi. Polar flagella in bundles of 14. Spores absent. 

 Gelatin colonies. Typhi- or coli-like. 

 Gelatin stab. Growth coli-like ; surface growth becomes sunken, with the 



formation of a bubble. 

 Agar slant and potato. Growth like B. coli. 

 Bouillon. Turbid, with a delicate membrane. 

 Habitat. Isolated from stagnant water. 



4. Spirillum tenerrimum Lehmann-Neumann 



Spirillum I Kutscher : Zeitsch. f. Hygiene, XX, 1895, 47. 

 Spirillum tenerrimum Lehmann-Neumann: Bak. Diag., 1896,346. 



Morphology. Bacilli short forms ; as a rule, thin. Spirilla of 3-4 elements. 



Gelatin colonies. Show a compact centre, a thin, finely granular zone, and an 

 outer filamentous border. 



Gelatin stab. Growth like that of the bacillus of mouse septicaemia, liquefac- 

 tion slow. 



Agar slant. Growth of dewdrop colonies. 



Bouillon. Slightly turbid no membrane. The above may be a Microspira. 



Habitat. Sewage. 



5. Spirillum undula (Mtiller) Ehrenberg 



Vibrio undula Mtiller: Historia Vermium terrestrium et fluviat Hauniae, 1773. 

 Spirillum undula Ehrenberg: Abhandl. Ber. Akad., 1830, 38. 



Morphology. Bacilli stout threads, 1 .2-1. 5 : 8-16 /x, one-half to three turns. 



Wave length, 4-5 fi. Bundles of 3-9 flagella at both poles. Spores 



present (Migula, I.e.). 

 Gelatin colonies. Deep : small, entire, granular ; no growth on the surface. 

 Gelatin stab. A development in the upper part of the stab ; on the surface, 



growth thin, white, somewhat rugose. 

 Potato. No growth. 

 Bouillon. Turbid ; no membrane. 

 Habitat. Putrid and stagnant water. 



