The Bulletin 25 



a recovery. We believe the per cent of recoveries will justify the ex- 

 pense of the serum used. 



Vaccinating Infected Herds. 



Do not fail to take the temperature of all hogs in infected herds. 

 Those showing a temperature of 104 degrees or higher should be given 

 a double dose of serum. 



jNTever use the Simultaneous treatment in infected herds (they already 

 have enough infection). Hogs injected with a protective dose of serum 

 and left in infected lots or pens for three weeks will, in all probability, 

 contract enough infection to produce the same immunity as those treated 

 with the Simultaneous method. However, one can never be sure of 

 this. 



The Dose of Serum. 



Care should be used in estimating the weight of every hog injected 

 because the amount of serum to be used will depend on the weight of 

 the hog and not on the age. Always be certain not to underestimate 

 the weight ; it is much better to overestimate than to underestimate. If 

 the weight is underestimated and too small a dose of serum is given, the 

 hog will not be protected from cholera. There is no danger in giving an 

 overdose of serum ; the larger the dose the more certain the protection. 



Avoid turning the hogs into muddy, filthy or dusty lots after they are 

 injected. It is better to keep them in a lot for several days until the 

 puncture wound caused by the needle has had time to heal. If the wound 

 becomes infected abscesses may follow. When abscesses form they 

 should be opened and washed with an antiseptic solution. 



A complete and accurate record should be kept by every farmer using 

 the serum. He should record the number of hogs that have died from 

 hog cholera at the time the serum is injected; also keep a record of the 

 number of sick hogs in the infected lots ; how many treated with serum ; 

 and the number of both treated and not treated that die. Don't fail to 

 take the temperature of all hogs in an infected herd. Those that show 

 a temperature of 104 degrees Fahrenheit are considered affected with 

 hog cholera. 



The Serum Plant. 



The J^orth Carolina Department of Agriculture has erected and 

 equipped a modern anti-hog cholera serum plant. It is the Department's 

 purpose to make and distribute a potent serum to the farmers of the 

 State at cost of production. 



In 1911 the charge for the serum was two and one-half cents per cubic 

 centimeter. This has been gradually reduced until it is now being dis- 

 tributed for one and one-quarter cents per cubic centimeter, the cost 

 of production. 



Tested Serum. 



All serum should be tested for potency before it is used in the field. 

 Serum sent out by this Department is tested in the following manner. 

 The bleedings from the tail and the final bleeding by the throat of a 

 number of hyperimmune hogs are thoroughly mixed, which is then 



