488 DISEASES OF SWINE 



lost except the '2 that were already sick at the time treatment 

 was given. The method of treatment used in these 2 sick ani- 

 mals is hardly that which would be used at the present time. If 

 instead of a dose of serum and virus these 2 animals had received 

 a double dose of serum alone their chances for recovery would 

 have been better. 



The double treatment is now regarded as a treatment to be used 

 only in animals that are healthy at the time of treatment. The 

 best method of judging this is by the use of the thermometer, A 

 hog may be sick with cholera and yet show no signs of it on careful 

 examination. If the temperature is taken, it will often be found to 

 be high for two or three days before the animal shows the loss of 

 appetite, droopiness, and muscular weakness which make the pic- 

 ture of fully developed cholera as seen in the feed lots of the hog- 

 producing belt. 



Always have temperatures taken in administering hog-cholera 

 serum treatment. If the animal shows a normal temperature, 

 the double method of injection should be used, giving both serum 

 and virus. If the temperature is elevated, the single or serum- 

 alone treatment is indicated. It is a good plan to increase the 

 dose in these cases that show a temperature, and, instead of the 

 equal amount of serum for an animal of this weight, give double 

 the amount. This method, if carefully followed, will result in a 

 much increased percentage of recoveries as a result of serum treat- 

 ment. 



Herd Number Thirty-three. — This herd also was located in the 

 infected territory in which Herd Number Ten was situated. This 

 thirty-third of the experimental herds was located about a quarter 

 of a mile from Herd Number Ten. The herd was well at the 

 time the treatment was given. The entire herd was treated in 

 order to check if possible the spread of the disease from the infected 

 herd on Farm Number Ten. 



Seven spring shoats, of an average weight of about 200 pounds 

 each, received 40 c.c. of serum. Six shoats of 120 pounds, weight 

 were each given 30 c.c. of the serum. The object of this experiment 

 was apparently to test the power of the serum-alone treatment in 

 the prevention of cholera. 



The results obtained were very satisfactory. None of the 



