The Bulletin 25 



tures 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.) 



Tlio Sonim as a Pun- f<»r Hoe: Cholera 



No claim is made that the serum ^vill ''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 a 

 recovery. We believe the per cent of recoveries will justify the expense 

 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. 



Never 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 liog 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. lie 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 num- 

 ber 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 tem- 

 perature of 104 degrees Fahrenheit are considered affected with hog 

 cholera. 



Tested Scnirn 



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: 



