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 /i. 



Gelatin colonies. Raised, which later become spreading. 

 Potato. Growth coarsely granular, crumpled, yellowish. 

 Habitat. Water. 



127. B. Kornii 



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



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



0.4-0.6 : 2-5 IX ; 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- of 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., ate 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. 



