THE CLASSIFICATION OF BACTERIA 221 



44. B. tetraonis 



B. of grouse disease E. Klein : Centraiblatt f. Bakteriologie, VI, 1889, 593. 



Morphology. Bacilli 0.4-0.6-1.0 /t, often coccoid. 



Gelatin colonies. Deep: small, round. Surface: thin, spreading, irregular. 



Gelatin stab. Surface growth flat. 



Pathogenesis. By subcutaneous inoculations it is pathogenic to mice in 75 per 

 cent and to guinea pigs in 50 per cent of the cases. Lungs hyperaemic, 

 hepatized ; spleen not enlarged ; kidneys hyperaemic ; bacilli in the blood 

 and organs. In grouse : pneumonia, local hyperaemia of the intestines, 

 enlargement of liver and kidneys. Bacilli in the blood and organs. 



45. B. cygneus 



Seftik&mie bacillus der Sckw&ne Fiorentini : Centraiblatt f. Bakteriologie, XIX, 



1896, 929. 



Morphology. Bacilli like those of fowl cholera but larger, 0.5 : 1 .5-2 fi threads. 



Gelatin colonies. Granular, concentric ; the border radiate ciliate. 



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

 lobed, and toothed. 



Agar slant. Round, white colonies, becoming coalescent. 



Potato. Growth of colonies, becoming coalescent, elevated, yellowish brown, 

 with a bad odor. 



Bouillon. Turbid, with a white sediment. 



Patfwgenesis. Pathogenic to rabbits, guinea pigs, hens, pigeons, geese ; a 

 comatose condition, followed by death. In affected swans, cedematous 

 infiltration of the lungs ; ecchymoses of serous membranes, hyperaemia of 

 intestinal mucous membrane, and turbid degeneration of liver cells. 



46. B. aercbius 



Ein neuer B.des malig. Oedems Klein : Centraiblatt f. Bakteriologie, X, 1891, 186. 

 B.pseudo-oedematis maligni Sanfelice : Zeitsch. f. Hygiene, XIV, 1893, 353. 

 B. oedematis-aerobius Kruse : Fliigge, Die Mikroorganismen, 1896. 



Morphology. Bacilli 0.7 : 1.6-2.4-24 ft. 



Gelatin colonies. Deep: round, brownish. Surface: thin, spreading, typhoid- 

 like, marmorated. 



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

 dentate. 



Agar slant. Growth grayish white, smeary. 



Bouillon. Turbid ; no pellicle. 



