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30 



THE OEGANISM IS A BACILLUS. 



THE GELATINE IS LIQUEFIED. 



THE OEGANISM IS MOTILE, NON-CHEOMOGENIC, 

 WITH CIECUMSCEIBED COLONIES. 



Bacillus gracilis (Zimmerman), from water ; very slender, fine rods. 



Bacillus of cholera (Spirillum cholerse), discovered by Koch, 1884 ; 

 slightly-curved rods with roimded ends, 0'8 to 2 /« in length, 

 sometimes growing into long spiral filaments ; actively motile ; 

 wiU not grow below 14° C. or above 42° C; will not stain by 

 Gram ; gives the indol reaction with H2SO4 added to peptonized 

 bouiUon. 



Bacillus or Spirillum of Finkler, from the faeces of persons suffering 

 from cholera nostras ; resembles the cholera bacillus ; the gela- 

 tine, however, liguefies more rapidly, and in rather a different 

 manner. 



Bacillus or Spirillum Metschnikovi, from the intestinal secretion 

 of fowls suffering from a disease resembling fowl cholera; 

 curved rods with round ends in spiral filaments ; the segments 

 are shorter, thicker, and more curved than in the comma 

 bacillus. 



Bacillus or Spirillum tyrogenum (Deneke), from old cheese ; 

 resembles Bacillus cholerae and Finkler; the indol reaction is 

 very faint. 



Bacillus of symptomatic anthrax, from the affected tissues of cattle ; 

 bacilh 3 to 5 /i long, with oval spores rather thicker than the 

 rods, lying shghtly to one end ; a number of flagella can be 

 demonstrated by Loffier's staining ; very motUe ; decolourised 

 by Gram. 



Bacillus megatherium, found in water from boiled cabbage-leaves ; 

 bacilh 6 ij. long, with rounded ends, forming chains ; sporulation 

 well naarked. 

 Bacillus butyricus of Hueppe, from milk ; bacilli 2 yu, long, slightly 

 curved, growing in filaments, forms oval spores in the centre of 

 the rods. 

 Bacillus mesentericus vulgatus, from air, etc. ; very common; thick 

 bacilli with round ends, 1 to 3 /t long, often in pairs or chains 

 showing spherical spores ; hquefies blood serum ; colonies form 

 a grayish wrinkled film on the surface of the liquefied gelatine. 



