BACTERIA PATHOGENIC FOR ANIMALS. 167 



from it and each other but very little. They have been described 

 by various observers and found in different diseases. 



(1) The bacteria of this group color themselves strongly at 

 the poles, giving rise to tbe dumb-bell shape. They do not take 

 the Gram stain. They are without spores, 



(2) And do not liquefy gelatine. 



They have been placed in three general divisions : 

 f Wild Plague. (Hueppe.) 

 I German Swine Plague. (Lb'ffler, Schiitz.) 

 1st division. { Rabbit Septic-asm ia. 



I Ox Plague. (Oresti-Armanni.) 

 [ Steer Plague. (Kitt.) 



The bacteria of the first division are not motile, do not grow 

 on potato, and are found scattered through the bloodvessels. 

 A local reaction is uncommon. 



f American Swine Plague. (Billings.) 

 j French Swine Plague. (CornilandChantemesse.) 

 n ' | Cattle Plague. Texas Fever. (Billings.) 



( Frog Plague. (Eberth.) 



Here the bacteria are motile. They grow on potatoes and 

 are similar to the typhoid bacillus in gelatine. They form 

 small embolic processes in the capillaries. They cause only 

 a local disturbance in rabbits when subcutaneously injected. 

 An acid fermentation is produced in milk. 

 . . f Hog Cholera. (Salmon.) 



l< 1 Swedish Swine Plague. (Lelander.) 



The bacteria of this third division are very motile. The hog- 

 cholera bacilli lie in the spleen and other organs in small masses 

 like the typhoid bacillus. 



Rabbits die in four to eight days without any local disturb- 

 ance. The growth on potato is strong. 



The Swedish swine-plague bacillus occupies a position be- 

 tween that of Hog Cholera and Bacillus Coll Oomnnmis. 



The various swine-plague bacilli are but little active in fowls, 

 differing thus widely from the chicken cholera bacillus. 



Bacillus of Erysipelas of Swine. (Loffler, Schiitz.) Schweine- 

 rollaufbacillus (German). Rouget du pore (French). 



