PROTECTION OF SURROUNDING HERDS 405 



PROTECTION OF SURROUNDING HERDS 



Having treated the herd which is the seat of the outbreak, the 

 next step to be taken in the handhng of the disease is to protect 

 the herds immediately surrounding the one where the disease has 

 made its start. 



This can be done in part by the establishment of a quarantine 

 of the infected farm, and by proper instruction of the owner of this 

 infected herd as to burning of any animals that may die, and proper 

 cleaning up of the feed lots after the outbreak has run its course or 

 been checked by the use of the serum treatment. 



Proper instruction should also be given by those in charge of the 

 hog-cholera work as to the danger of passing from one feed lot to 

 another. Hog owners should be instructed as to the danger from 

 this source, and every aid that we can derive from proper quaran- 

 tine and sanitary regulation should be made use of. 



The next thing to be done is to proceed to the farms which 

 immediately surround the infected farm, and protect the animals 

 on these farms by the giving of the serum-simultaneous treatment. 

 All the hogs within a distance of one mile in every direction, and 

 especially those herds which are located on the farms which join 

 fences with the infected farm, should receive this method of 

 treatment. 



In beginning the work in these animals it is always well to 

 watch the temperatures carefully in the animals that are injected, 

 and be on the lookout for cholera which has not yet made itself 

 known by any visible symptoms. Watch for high temperatures, 

 which are the first sign of danger. When an animal shows a tem- 

 perature of over 105° F., and has been exposed to a possible chance 

 of getting the infection, the safe course is to presume that the tem- 

 perature is due to cholera which is starting to develop, and protect 

 the animal by giving a double dose of the serum. In those animals 

 which show a normal temperature, or even up to 104° or 105° F., 

 give the regular dose of serum and at the same time a dose of the 

 virus. 



By doing this we develop a permanent immunity to hog-cholera 

 in these herds, and we in this manner surround the infected herd 

 by a wall of hogs which cannot possibly take the disease. This 

 checks the spread of the outbreak, as the germs will not be able to 



