42 



Veterinary Medicine. 



Hog Cholera. 



McFadyean's. 



Swine Plague. 



B. Cholerae Suis. Swine fever B B Pestis Suis 



1.2 to 2/ltX5 too.SAi ito2/tXo.6/i o.8to i.5;it X 0.6 to o.8/t 



Ends rounded Ends rounded Ends rounded ... 



Involution forms Involution forms 



Actively motile in liquids Actively motile Nonmotile 



Flagella 



Stains throughout, light 

 er in center 



Bleaches in Gram's (I 

 Sol. 



iErobic (Fac. Anaerobic) 

 Vigorous growth in alka- 

 line nutrient fluids 



Active growth on potato 

 yellowish, becoming 

 darker 



On gelatine,small, round 

 brownish colonies 



Nonliquefying 



On agar conical colonies, 

 grayish white, semi- 

 translucent, shining 



In milk grows freely, no 

 acid, no clot : Saponi- 

 fies in 3 or 4 weeks 



Forms no indol in pan- 

 creatic bouillon 



Feiments glucose, form- 

 ing acid and gas 



Lactose not fermented.. 



Saccharose not ferment- 

 ed ; alkalinity ; no gas 



Thermal death point 

 (moist) 58° C. in 15 

 minutes 



Desiccated it dies accord- 

 ing to bulk in 7 to 49 

 days 



Dies in water in 3 to 4 

 months 



Dies in soil in 2 to 3 

 months 



No Flagella 



Polar or uniform faint From fresh organs polar 



stain stain, from old cultures 



uniform 



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

 Sol Sol 



.^robic .i3Brobic,(Pac. Anaerobic) 



Slight growth in alkaline Weak growth in alkaline 

 nutrient fluids nutrient fluids 



No growth on potato 



On gelatine light bluish 

 colonies shading off in- 

 sensibly at edges 



Nonliquefying 



On agar slight, transpa- 

 ent, almost invisible 

 growth 



Grows in milk, no clot _ 



On potato at 37° C. a 

 slight, thin gray, waxy 

 layer 



On gelatine feeble 

 growth or none 



Nonliquefying 



On agar, grayish trans- 

 lucent, or brown, 

 knobbed, wavingedges 

 Grows in milk, no acid, 

 no clot 



Forms no indol in pan- 

 creatic bouillon 



Does not ferment glu- 

 cose, forms acid , no gas- 

 Lactose not fermented 



Saccharose fermented, 



forms acid, no gas 



Thermal death point 

 (moist) 58°C. in 7 min- 

 utes 



Dies quickly, if dried at Dies in 3 days if dried 



body temperature 



Dies in water in 10 to 15 



da^s 



Dies in soil in 4 to 6 days 



Thermal death point 58° 

 C. in 10 minutes 



Pathogenic to swine, rab- Pathogenic to swine and Pathogenic to swine, 



bits, guinea pigs, mice, rabbits hens, pigeons, pheas- 



pigeons ants, sparrows, mice, 



rabbits, cattle, deer, 



guinea pigs; etc 



Guinea pigs immune 



