400 DISEASES OF SWINE 



and among the stockmen, destroyed by improper use of serum and 

 virus. First, make sure that you have a rehable quality of serum, 

 a good grade of virus, and then, if you are capable of giving the 

 remedies correctly, you cannot fail of having good results. 



The outlines given in this book for guidance in the using of 

 these methods of treatment are sufficiently clear that any man, 

 who has had the benefit of an education in a veterinary college or a 

 state agricultural college in recent years, should have no difficulty 

 in obtaining a clear understanding of every step of the process and 

 the scientific basis which underlies each step of the work. How- 

 ever, a trip of a day or two to one of the large serum plants will give 

 him an actual insight into the methods of preparing the serum and 

 the manner of using same that will more than repay him for the 

 time and money spent in making the visit. 



Which Method to Choose. — The two principal methods of using 

 hog-cholera serum have been very carefully discussed, and it is 

 now time to consider the question, When should the single method 

 and when should the double or serum-simultaneous method of 

 giving serum be used? This is a very important one, and one that 

 must necessarily be settled before commencing work on each indi- 

 vidual herd. The conditions surrounding each case will determine 

 the answer to the question. 



In a few cases, especially in those localities where a prejudice 

 has grown up against the double method of treatment, either due 

 to poor results following its improper use, or to an improper under- 

 standing of the principles upon which this method of treatment are 

 based, it will be impossible to make use of the double treatment, 

 simply because the owner will not allow you to use it. While a 

 reasonable amount of effort should be used to show the advantages 

 of this method of treatment, yet it is not advisable to push your 

 ideas in the matter to the point of arousing the ill-will of the man. 

 It is better to make use of the single method than none at all, even 

 if you are of the opinion that the use of the double method would 

 have been the better practice. In introducing any new method 

 of handling a disease which has for so many years been regarded as 

 incurable it is only reasonable to expect a certain amount of "show 

 me" attitude on the part of those who have been so often deceived, 

 as has been the case in the matter of hog-cholera. It is necessary 



