TREATMENT 17 



a great saving in losses from disease, and the cost of building in 

 many cases would be lessened. Your neighbor's building that 

 YOU have taken for your model may not be suitable for your 

 needs. It may be more expensive than your financial condition 

 permits. It may be poorly lighted and ventilated and not suited 

 to the site that you have selected. 



Biological Products. — There are a number of biological prod- 

 ucts that may be used in the prevention and control of disease. 

 Some of these products, such as tuberculin and malein, enable the 

 owner to rid his herds of tubercular cows and glandered horses 

 before these diseases have become far enough advanced to be 

 recognized by the visible s^Tuptoms alone. Black leg, anthrax 

 and hog-cholera vaccines are valuable agents in the control of 

 disease. In the treatment of fistula and infectious abortion, 

 bacterins may be used. There are many other germ diseases and 

 infections for which vaccines and bacterins may be used. How- 

 ever, we must not depend wholly on these agents in the control of 

 disease. We must possess a knowledge of the manner in which 

 the infection is spread, for without this knowledge we would be 

 unable to prevent its dissemination over a wide area. 



Medicinal Treatment. — The average stockman or veteri- 

 narian is more familiar with the treatment of disease with drugs 

 than he is with the preventive measures just described. This 

 statement does not imply that a knowledge of medicinal thera- 

 peutics is not of the greatest importance in the treatment of 

 disease. The ultimate object of all drugs is both to prevent and 

 cure disease, but the injudicious use of a drug does neither. A 

 discussion of this subject cannot be entered into here, and because 

 of its largeness it is not advisable to discuss it further than a 

 brief summary of the methods of administering drugs. 



Administration of Drugs. — Drugs may be administered by 

 the following chamiels : by way of the mouth, in the feed or as a 

 drench ; by injecting into the tissues beneath the skin or hypo- 

 2 



