282 INFECTIOUS DISEASES 



receive one-half eubic centimetre of serum for each pound of 

 body weight, and cholera hogs should be given one-half more to 

 twice the dose that is recommended for healthy animals. To 

 establisli permanent immunity not less than two cubic centimeters 

 of hog-cholera blood should be given. 



In vaccinating small pigs not more than five, and in large 

 hogs not more than twenty, cubic centimetres should be injected 

 at any one point. The hody temperature of each animal should 

 be taken. A body temperature of 103.5° F. in a mature hog 

 and a body temperature of 104° F. in a young hog may indicate 

 hog-cholera. Exercise, feeding and close confinement in a warm 

 place may raise the body temperature above the normal. 



Hogs that are to be vaccinated or treated should not be given 



feed for at least twelve hours before handling them. If possible 



they should be confined in a roomy, clean, well-bedded pen. If 



this is practised, they are cleaner and easier to handle and their 



body temperatures are less apt to vary. After the treatment or 



vaccination the hogs should be fed a light diet for a period of at 



least ten days, and the ration increased gradually in order to 



avoid causing acute indigestion. This is necessary because of 



the elevation in body temperature resulting from the inability 



of the animal to digest heavy feeds, kitchen slops and sour milk. 



If poor judgment is used in caring for the vaccinated hogs, and 



the person who vaccinates them uses careless methods, heavy 



losses from acute indigestion, blood poisoning, or hog-cholera 



may occur. 



QUEISTIONS 



1. What is the specific cause of hog-cholera? Give and describe the different 



methods of spreading the disease. 



2. What are the symptoms of hog-cholera? 



3. Give the preventive and curative treatment of liog-cholera. 



4. What is anti-hog-cholera serum? Give the different methods of vaccina- 



tion and treatment. 



