174 



BACTERIOLOGY 



B. Gelatin colonies not characterized as above, or not described. 



1. Pigment, brick-red, or carmine to blood-red. 



a. Grow on fresh (acid) potato. 



147. Bact.finitimum (Dyar). 



148. Bact. ovatum (Bruyning). 



b. Scarcely grow on fresh (acid) potato. 



149. Bact. Havaniensis (Sternberg). 



2. Pigment brick-red. 



150. Bact. latericium (Adametz). 



3. Pigment bright pink to salmon-pink. 



151. Bact. rhodochroum (Dyar). 



152. Bact. salmoneum ( Dy ar) . 



138. Bact. pyocinnabareum (Kruse) 



B. uber rote Eiterung Ferchmin : Wratsch, 1892, Nos. 25-26. 

 B.pyocinnabareus Kruse: Fliigge, Die Mikroorganismen, 1896. 



Morphology. Bacilli 0.8 : 2.5 /u,, to threads. Optimum temperature 37. 



Gelatin colonies. Irregular, erose, granular. 



Gelatin stab. Liquefaction funnel-formed ; red sediment. 



Agar slant. Growth reddish, moist. 



Potato. Growth yellowish to reddish. 



Bouillon. Turbid ; red membrane ; trimethylamine odor. 



Pathogenesis . Not pathogenic ; toxic in large doses. 



Habitat. From green pus. 



139. Bact. erythrogenes (Grotenfelt) 



Bact. lactis-erythrogenes Grotenfelt : Fortschritte d. Medizin, 1889, No. 2. 



Morphology. Bacilli 0.2-0.3 : 1.1-4.0 /*. 



Gelatin colonies. Round, grayish yellow to yellow ; rose color to the surround- 

 ing-gelatin. 



Gelatin slab. Along line of stab a slight growth; surface growth thin, 

 whitish, becoming yellow ; liquefied gelatin of a pinkish tint. 



Agar slant. Growth yellowish to weak yellowish red. 



Milk. Coagulated slowly, becoming peptonized, amphoteric to alkaline; a 

 layer of blood-red serum above the precipitated casein ; above this the 

 yellowish white cream layer. 



Bouillon. Turbid, with a yellowish tint, and a disgusting odor. 



Glucose-bouillon. No gas. Indol present. H 2 S present. 



