158 BACTERIOLOGY 



Palhogenesis. Intraperitoneal inoculations of guinea pigs cause death in 4-5 

 days ; enlargement of the testicles, tubercles on the diaphragm, testicles, 

 etc. ; with larger doses the peritoneum is affected as above. Mice inocu- 

 lated subcutaneously die in 4-7 days ; abscess, hemorrhagic oedema ; with 

 intraperitoneal injections, yellowish tubercles on the peritoneum. Rabbits 

 nearly immune. 



Habitat. Isolated from nasal secretions of a glandered horse. 



97. Bact. pneumonicum (Kruse) 



Pneumobacillus liquefaciens-bovis Arlong : Compt. rend., 99, 109, 116. 

 B.pneumonicus-liquefaciens Kruse: Fliigge, Die Mikroorganismen, 1896. 



Morphology. Short rods coccoid forms. Cultural characters not fully de- 

 scribed. 



Potato. Growth whitish, to brown. 



Pathogenesis . Intraperitoneal inoculations of guinea pigs and rabbits cause 

 death ; dogs but little affected. 



Habitat. Isolated from exudate in lung plague of cattle. 



98. Bact. varicosum (Sternberg) 



Gombert : Rech. exp6r. microbes conjonctives, Paris, 1889. 



B. varicosus-conjunctivce Sternberg : Manual of Bacteriology, 1892, 474. 



Morphology. Bacilli I .o : 2.0-8.0 /x ; short, often constricted in the middle. 



Slight growth at 22 C. ; optimum temperature 37. 

 Agar colonies. In 4 days colonies 4 mm., with minute thorny projections ; an 



opaque nucleus, and a yellowish, granular, transparent zone, from which 



proceed twisted, bent, tapering offshoots. 

 Gelatin stab. In depth, but slight growth; on the surface, growth round, 



flat, grayish white ; liquefaction extends gradually downward. 

 Agar slant. A thin, dry, white, adherent film. 

 Potato. Growth dry, white, spreading; surface irregular, and margins fringed; 



later, reddish brown. 



Pathogeuesis. An inflammation of the cornea of rabbits from local infection. 

 Habitat. Isolated from the healthy conjunctival sac of man. 



99. Bact. aromaticum (Pammel) 



B. aromaticum Pammel: Iowa Ag. Expt. Sta. Bui. 21, 1893, 792. 



Morphology. Bacilli 0.3-0.4: 0.9-1.2 ju ; ends rounded. Grow slowly at 35. 

 Gelatin stab. Liquefaction crateriform saccate, with gas production. 

 Agar slant. Growth white, spreading. 

 Milk. Coagulated, acid, slowly peptonized. 



