Cholera Suis, Hog Cholera, etc. 43 



Swine Erysipela,. B.Coli Commune. Typhoid Fever. 



B. of S. Erysipelas B. Typhi Abdominalis.. 



I to 1.5/i X 0.1 to 0.2M— 2 to 3A* X 0.4 to o 6At I to 3/i X 0.6 to 0.8/i 



Ends rounded Endsrounded Ends rounded 



Involution forms Involution forms 



Nonmotile in liquids... Nonmotile or very slight Motile 



ly so 



Noflagella.. No flagella Flagella 



Stains readily and uni- Stains uniformly or polar Stains uniformly (points 



formly clear) 



Stains in Gram's (I) Bleaches in Gram's 



Sol. 



Anaerobic (F. ^robic) . ^robic (F. Anaerobic), ^robic (F. Anaerobic). 



Active growth in com Grows well in usual nu- Grows well in usual nu- 



mon nutrient liquids trient liquids, even if trient liquids 



at 37°C acids 



Usually no growth on Yellowish thick white Grows on potato ; trans- 

 potato ; variable growth on potato parent glistening sur- 

 face 



In gelatine stab culture In gelatine amber colo- ON gelatine clear colo- 



delicate feathery, nies, becoming brown; nieswithradiatingand 



branching growth may be bubbles of gas encircling lines 



Nonliquefying Nonliquefying Nonliquefying 



Grows in milk ; acidi- Acidifies and clots milk Acidfies milk growing 

 fies, often coagulates it in 8 to 10 days freely 



Thermal death point Thermal death point Thermal death point 



(moist) 58°C. in 10 (moist) 60° C in 10 (moist) 560C. in 10 



minutes minutes minutes 



Loses virulence rapidly 



when dried 



Dies in water in 18 to 20 



days . 



Lives and even multi Lives and grows m faeces 



plies in rich soils, 



manures, etc. -. 



Loses virulence slowly in , 



light and air 



Pathogenic to swine, 



pigeons, sparrows,rab- 



bits, white and house 



mice, white rats 



Guinea pigs, field mice 



and hens immune 



