The Bulletin 23 



to use the Simultaneous or Double treatment. This would insure pro- 

 tection at all times to the foundation of the herd. 



The owner of a herd of hogs should not delay any longer than possible 

 in securing the serum and injecting his hogs when it becomes known that 

 they have been exposed to cholera, or when it is known that cholera is 

 in his commiinity, if there is any possibility of the infection gaining 

 entrance to his herd through any of the many channels of entrance. 



When the serum is used shortly before or very soon after the hogs are 

 exposed to cholera infection the per cent protected is often as high as a 

 hundred, but usually ranges around 95 per cent. After cholera has 

 gained entrance in a herd and a portion of the hogs are showing physi- 

 cal or thermal symptoms of cholera, the per cent saved of the remaining 

 apparently well hogs will not be so high, but a good per cent of those 

 showing no physical or thermal symptoms will be protected. 



When a large number of hogs in a herd become sick and begin to die 

 it is pretty safe to say that they are affected with hog cholera. Imme- 

 diate steps should be taken to secure the serum and inject the remaining 

 well hogs. 



To inject the serum one must have a hypodermic syringe (preferably a 

 20 or 30 c.c. glass barreled one). This syringe should be sterilized 

 by being boiled in water for fifteen or twenty minutes. Before using, 

 the mouth of the serum bottle should be wiped off with a five per cent 

 solution of carbolic acid and the serum then poured into the receptacle 

 with a cover. Both the receptacle and cover should have been boiled in 

 water for fifteen or twenty minutes and allowed to cool before pouring 

 the serum into it. Keep the cover on all the time except when the 

 serum is being poured into or taken from the receptacle. The hands 

 of the person injecting the serum should be washed before beginning 

 and kept clean all the time. Do not allow the syringe or needle to come 

 in contact with soiled objects. 



The serum is injected into the tissues either on the inside of the thigh 

 or into the loose tissues between the foreleg and body. The needle is 

 inserted perpendicularly to the depth of one-half or one inch, depending 

 upon the size of the hog. The serum is then injected and the needle 

 Avithdrawn. Before the needle is inserted the skin at the point selected 

 should be washed with soap and water and then scrubbed with a reliable 

 disinfectant, such as a five per cent solution of carbolic acid, lysol or 

 creolin. 



Hogs in infected herds showing a temperature above 104 degrees F. 

 are considered to be affected with cholera. The hogs showing high tem- 

 peratures should be given a double dose of serum ; apparently well hogs 

 in infected herds should be given more serum than hogs in non-infected 

 herds. (See dose table.) 



The Serum as a Cure for Hog Cholera. 



No claim is made that the serum will "cure" a well developed case 

 of hog cholera. A small per cent of the hogs showing a temperature 

 above 104 degrees Fahrenheit will, if given a large dose of serum, make 



