THE CLASSIFICATION OF BACTERIA 141 



Bouillon. Turbid, with a bad odor. 



Pathogenesis. Pathogenic for rabbits only by intraperitoneal injections. 



Habitat. From human liver of a cadaver. 



48. Bact. diphtheriae (FHigge) 



Bacillus der diphtheria bei der Taube Loftier : Mitteilungen Kaiserlichen Gesund- 



heitsamte, 1884, 421. 

 Der Lofller Bacillus Babes- Puscariu : Zeitsch. f. Hygiene, VIII, 1890, 376. 

 B. diphthericc-columbarum Flugge : Die Mikroorganismen, 1886. 



Morphology . Bacilli somewhat longer and more slender than the bacillus of 

 fowl cholera. 



Gelatin colonies. Similar to B. typhosus. 



Agar slant. Growth gray, translucent. 



Bouillon. Turbid. 



Potato. Growth white grayish. Indol negative. 



Pathogenesis. Inoculations of mice and rabbits cause death, with necrotic 

 spots in liver containing bacilli ; spleen enlarged. Pigeons infected 

 through wounds of the mouth show diphtheritic deposits containing 

 bacilli, with death in 1-3 weeks ; bacilli in the organs after death. 



Habitat. Associated with diphtheria in pigeons. 



49. Bact. columbarum (Kruse) 



Microbe maladie des palombes Leclainche: Annales Pasteur Institut, 1894,490. 

 B. cholera-columbarum Kruse: Flugge, Die Mikroorganismen, 1896, 417. 



Morphology. Bacilli somewhat larger than bacilli of fowl cholera. Cultures 

 similar to the latter. 



Bouillon. Not turbid, but a flocculent sediment. 



Potato. Growth grayish yellow. 



Pathogenesis. Subcutaneous inoculations of rabbits and guinea pigs cause 

 death in about 8 days. By feeding cultures to wild pigeons death follows 

 in 3-6 days, with symptoms of chicken cholera. Differentiated from fowl 

 cholera and No. 48 by its effect upon guinea pigs, growth in bouillon, etc. 



Habitat. Associated with a disease of wild pigeons. 



50. Bact. cuniculi (Kruse) 



Bacillus der Darmdiphtheria des Kaninchens Ribbert : Deutsche, medizinische 



Wochenschrift, 1887. 

 B. diphlheria-cunicuh Kruse : Flugge, Die Mikroorganismen, 1896, 412. 



Morphology. Bacilli 1 .0-1 .4 : 3.0-4.0 ft.. 



Gelatin colonies. Similar to B. coli. 



Potato. Growth flat, whitish, slightly spreading. Indol negative. 



