28 Veterinary Medicine. 



Hog Cholera. McFadyean's. Swine Plague. 



Hen or pigeon has sloiigh Hen or pigeon dies in 48 



where inoculated, diar- hours, after drowsi- 



rhcea, ruffled plumage, ness, drooping wings, 



somnolence sunken head, ruffled 



plumage, liquid stools, 

 soft black comb and 

 wattles, prostration — 



Rabbits getting o.icc. Rabbits getting 0.5 to Rabbits getting o.oicc. 

 virulent culture sub- icc. culture subcutem culture subcutem die 

 cutem die in 5 to 7 days had tumor like walnut in 16 to 20 hours, with 



with enlarged spleen but recovered inflamed serosse and 



and necrotic liver foci. lung ; Petechise___ 



Weaker culture kills in Weak cultures kill in 4 



10 to 20 days with en- to 10 days, with in- 

 larged spleen, or re- flamed serosse and sup - 

 covery ensues pnration 



Guineapigs die in 7 to 12 Not pathogenic to Guin- Guineapigs die in i to 4 

 days eapig days 



Swine inoculated subcu- Swine inoculated have 



tem have often local local lesions only,only 



lesions and bacilli, also exceptionally fatal 



in lymph glands, only 

 exceptionally fatal 



Ingestion of virulent cul- Ingestion of 30 cc. by Ingestion of virulent cul- 

 tures by fasting pig pigs proved always tures by pigs is usually 



causes bowel lesions fatal harmless 



and death 



Intravenous inoculation Intravenous inoculation 



in pig causes septicse- causes septicaemia and 



mic lesions and death, death in i or 2 days_- 



or chronic diseases and 

 typical bowel ulcers.. 



Intrapulmonary infec- 

 tion causes pleuro- 

 pneumonia 



Swine erysipelas kills inoculated pigeon in 3 to 8 days, and rabbit in 4 to 8 

 days. 



Accessory Causes. These are especially those conditions which 

 favor the transmission of the germ from animal to animal. They 

 include the reprehensible habit of allowing swine to run at large 

 so that herd mingles with herd ; the freedom to wander along 

 the lines of railroad by which hogs are carried, and where the 

 infected excretions fall on the ground ; the scattering of infected 

 litter or manure from a car or boat ; the use of the same cars, 

 boats or trucks for the conveyance of infected and sound pigs in 

 succession, without intermediate disinfection ; the use of the 

 same loading banks, chutes, runways, yards, pens and feeding 

 and watering troughs by strange pigs from all sources in succes- 



