THE CLASSIFICATION OF BACTERIA 265 



Agar slant. Growth thin, white. 



Potato. Growth brown. 



Pathogenesis. Intravenous inoculations of rabbits cause death in 2-3 weeks ; 



pneumonia, pleuritis, pericarditis. 

 Habitat. Isolated from a hog with bronchopneumonia and enteritis. 



CLASS XIV. WITHOUT ENDOSPORES. OBLIGATE ANAEROBIC GEL- 

 ATIN NOT LIQUEFIED. 



I. Grow at room temperatures and in nutrient gelatin. 



161. B. tumidus 



B. I Sanfelice : Zeitsch. f. Hygiene, XIV, 1893. 



Morphology. Bacilli of variable length, with bladdery swellings. Motility 



slight. 

 Gelatin colonies. Round, glistening, finely granular ; edges floccose, or with 



B. Zofi/i-Wkt outgrowths. 

 Agar slant. Growth thick, floccose tomentous. 

 Gelatin stab. In death, growth beaded, with gas production. 

 Habitat. Isolated from putrefying flesh. 



II. No growth at room temperatures or in nutrient gelatin. 



162. B. thermophilus 



Ein neuer anaerober Bacillus des malignen Oedems Novy : Zeitsch. f. Hygiene, XVII, 



1894, 209. 

 B. aedematis-thermophilus Kruse : Fliigge, Die Mikroorganismen, 1896, 242. 



Morphology. Bacilli 0.8-0.9 : 2.5-5.0. Numerous lateral'flagella. Stained 

 by Gram's method. 



Gelatin colonies. Floccose. 



Glucose bouillon. Gas, without odor, or that of butyric acid. Reduces litmus. 

 No growth below 24 . 



Pathogenesis. Very virulent for mice, rats, guinea pigs, rabbits, cats, and 

 pigeons by subcutaneous inoculation of 0.1-0.25 cc. There is an oedema, 

 with much gas ; abdominal muscles red with hemorrhagic flecks ; pleural 

 and abdominal cavities contain a colorless exudate. 



Habitat. Isolated from a guinea pig which was inoculated with a contami- 

 nated nuclein culture. 



