212 BACTERIOLOGY 



1 6. B. morbificans Basenau 



Archiv f. Hygiene, XX, 1894, 242. 



Morphology. Bacilli 0.3-0.4: 1.0-1.2 fx. 



Gelatin colonies. Surface : papillate, yellowish, to flat and spreading ; border 

 erose. Microscopically, the colonies have a dark contour, within which 

 is a clear zone and within this a yellowish granular to mottled centre. 



Gelatin stab. Growth in depth filiform ; surface growth thick, round, white, 

 with an undulate border. 



Potato. Growth moist, yellow, never brown. 



Bouillon. Turbid, with a membrane. 



Glucose bouillon. A small amount of gas. No gas in saccharose bouillon. 



Litmus milk. Unchanged. 



Pathogenesis. Pathogenic to mice, guinea pigs, and rabbits by subcutaneous 

 and intraperitoneal inoculation, and by feeding. Calves and goats 

 infected by feeding. Bacilli in the organs and in the muscles. Com- 

 municated through infected meat. 



Habitat. Isolated from the flesh of a cow with puerperal fever. 



17. B. Silberschmidii 



B. der Fleischvergiftung Silberschmidt : Correspondenz-Blatt fur Schweizer 

 Aerzte, 1896, No. 8. 



Morphology. Bacilli short rods. Flagella 4-8. 



Milk. Not coagulated ; no acid. Cultures have a faint sweetish odor. 



Pathogenesis. Mice, guinea pigs, and rabbits were fed on infected meat with 



negative results. Intraperitoneal inoculation of guinea pigs caused death 



in 18-36 hours. 

 Habitat. Isolated from poisonous meat. 



18. B. murium Loffler 



B. typhi-murium Loffler: Centralblatt f. Bakteriol., XI, 1892, 129. 



Morphology. Bacilli like B. typhosus. 



Gelatin colonies. Deep: small, round, slightly granular, yellow-brown. 



Surface : like B. typhosus. 

 Gelatin stab. Surface growth flat. 



Potato. Growth whitish-grayish. Indol and phenol production doubtful. 

 Milk. Rendered alkaline. 



