154 BACTERIOLOGY 



85. Bact. Grawitzii (Trev.) 



Bacillus der Acne Contagiosa de Pferdes Dieckerhoff-Grawitz : Virchow's Archiv, 



CI I, 148. 

 B. Grawitzii Trevisan : Genera, 1889, 13. 

 B. acnes-contagiosa Kruse : Flugge, Die Mikroorganismen, 1896, 445. 



Morphology. Bacilli very small, long-oval rods ; occur singly, or in short 

 chains. Stain with difficulty. 



Gelatin stab. In depth, a beaded growth. 



Potato. Scarcely any growth. 



Pathogenesis. Rubbing cultures into the skin of horses causes characteristic 

 pustules. Subcutaneous inoculations of rabbits, toxic symptoms ; bacilli 

 not spreading. In guinea pigs, by rubbing into skin, death with hemor- 

 rhagic serous inflammation. Mice die by subcutaneous injections in 1-10 

 days ; bacilli in the organs. 



Habitat. Isolated from acne-contagiosa in horses. 



86. Bact. tenue (Pansini) 



B. sputigenes-tenuis Pansini : Virchow's Archiv, CXXII, 1890, 453. 



Morphology . Bacilli small, of variable length ; in twos and chains ; in the 

 body with a capsule. 



Gelatin colonies. Round, raised slightly spreading, yellow, concentric, ra- 

 dially striped. 



Gelatin stab. In depth, growth beaded ; on the surface, yellowish. 



Potato. Growth yellowish, flat. 



Pathogenesis. Mice and guinea pigs refractory to ordinary quantities of the 

 virus. Subcutaneous inoculations of 0.5 to 1.0 cc. into rabbits cause death 

 by septicaemia ; slight local effect, hemorrhage in peritoneum ; spleen 

 enlarged. 



Habitat. Associated with advanced phthisis and catarrhal pneumonia. 



B. pyogenes-minutissimus Kruse. From pus in man. From the descriptions, 

 not differentiated from the preceding. 



87. Bact. subviscorum Migula 



Bacillus schleimiger Milch Adametz : Landw.' Jahrbiicher, 1891, 185. 



B. lactis-viscosus Krammer: Die Bakteriologie I^andwirthschaft, II, 189a, 26. 



Bact. subviscorum Migula : System des Bakterien, 1900. 



Morphology. Bacilli 1.1-1 .3 : 1.2-1.7 fi filaments ; with a capsule. 

 Gelatin colonies White, slimy, erose. 

 Agar slant. Growth dirty white, slimy. 



