252 BACTERIOLOGY 



Gelatin stab. Slight growth in depth ; on the surface a yellow membrane. 

 Potato. Growth scanty, slimy, yellow. 

 Habitat. Water. 



126. B. tremelloides Tils 



Zeitsch. f. Hygiene, IX, 1890, 282. 



Morphology. Bacilli 0.2 : i.o /x. 



Gelatin colonies. Raised, which later become spreading. 

 Potato. Growth coarsely granular, crumpled, yellowish. 

 Habitat. Water. 



127. B. Kornii 



B. of liver abscess Korn : Centralblatt f. Bakteriol., XXI, 1897, 438. 



Morphology. Bacilli short, thick rods, two times their breadth, or larger forms 



0.4-0.6: 2-5 ju; often in chains. Not stained by Gram's method. 

 Gelatin colonies. In 24 hours round, yellowish, granular. Gelatin liquefied 



quickly, with an irregular, ragged nucleus. 

 Gelatin stab. Liquefaction infundibuliform ; an ochre-yellow membrane; 



liquefaction progresses rapidly, with a yellowish fluid and sediment. 

 Agar slant. At 30 growth, abundant, raised, glistening, yellowish. 

 Potato. Growth thick, raised, glistening, yellow, becoming brownish. 

 Milk. Becomes yellowish, syrupy, and alkaline. Pigment insoluble in water, 



slightly so in alcohol. 

 Pathogenesis. Subcutaneous inoculations of mice with o. 1-0.25 cc - f a bouillon 



culture cause death with tonic cramps ; no change in internal organs, but 



an abscess at point of inoculation. 

 Habitat. Isolated from a case of liver abscess. 



128. B. Schirokikhi 



Centralblatt f. Bakteriol., 2te Abt., II, 1896, 205. 



Morphology. Bacilli 1.5 times their thickness ; in chains of 2-8. Show polar 



stain. Motility slow. ^ 



Gelatin colonies. In 3 days visible ; the gelatin is liquefied to a bright blue 



fluid, with yellowish granules. In 5 days the colonies are 1-2 mm. in 



diameter. 

 Gelatin stab. Liquefaction rapid, infundibuliform: liquefied gelatin grayish 



to yellowish, with a granular sediment. 



