194 



BACTERIOLOGY 



Bouillon. Clear, with a white flocculent precipitate. 



Potato. Growth thick, flesh-colored. Nitrates reduced to nitrites. 



Habitat. Water. 



199. Bact. viscosum 



B. No. 17 Adametz : Landw. Jahrbucher, XVIII, 1889. 



Morphology. Bacilli i .0-1.2 : 3-4 JJL filaments. 



Gelatin colonies. White ; edges irregular. 



Agar slant. Growth slimy, crimpled. 



Milk. Becomes plastic viscous ; odor of butyric acid. 



Habitat. Milk and cheese. 



200. Bact. rugosum 



B. No. 14 Adametz : I.e. 



Morphology. Bacilli i .0-1.2 /A in diameter ; rods to filaments, often interwoven. 



Gelatin colonies. In 3 days, 3-4 mm., white, slimy, slightly convex ; micro- 

 scopically, gray, coarsely granular grumose, erose. 



Gelatin stab. On the surface, a white membrane with fatty lustre under 

 which the gelatin is quickly liquefied. 



Agar slant. Growth thick, white, slimy, crumpled, becoming reddish yellow. 



Milk. A flocculent precipitate, alkaline, becoming peptonized. 



Habitat. Milk, cheese. 



201. Bact. granulosum (Russell) 



B. granulosus Russell: Zeilschrift f. Hygiene, IX, 194. 

 Morphology. Bacilli large and as filaments, contents granulated. 

 Gelatin colonies. Deep: small, round, glistening, opaque masses. Deep, 



thin, leafy ; microscopically, concentrically to reticulately marked. 

 Gelatin stab. Liquefaction shallow, crateriform. 

 Agar slant. Growth composed of thin, white-yellowish colonies, becoming 



confluent. 



Bouillon. Turbid ; sediment. 

 Potato. Growth in 24 hours, moist, white, limited, becoming thicker, dull, 



waxy, brownish. 

 Habitat. Sea-slime. 



202. Bact. filiforme (Tils) 



B.filiformis Tils : Zeitsch. f. Hygiene, IX, 1890, 317. 

 Morphology. Bacilli 1.0-4.0 /x filaments or chains. 

 Gelatin colonies. Deep : white, finely granular, with irregular edges. Surface : 



3 days whitish, striped ; microscopically, irregular, serrate ; centres uneven, 



granular, yellowish ; liquefied slowly. 



