128 HOG CHOLEKA 



ing on serum alone plus natural infection to pro- 

 tect young pigs more than four weks. 



Technique of serum administration. Require- 

 ments. Serum in covered container, or in a bottle 

 fitted with cannula through which it may be 

 drawn; hypodermic needles, and syringe, the lat- 

 ter preferably one of 30 or 40 mil capacity ; anti- 

 septic solution in large container, and scrub-brush, 

 for disinfecting site of injection; antiseptic solu- 

 tion in small container for disinfecting needles and 

 syringe. In field work these are placed conven- 

 iently upon an improvised table consisting usually 

 of a box covered with a clean towel or oilcloth. 



The pig is confined in the manner already de- 

 scribed, and the site of injection is thoroughly 

 cleansed with the scrub-brush dampened in anti- 

 septic. If syringe and needles have not been pre- 

 viously sterilized, they should now be thoroughly 

 disinfected, after which the required quantity of 

 serum is drawn into the syringe and injected 

 deeply into the tissues. As the needle is with- 

 drawn it is well to pinch the skin to prevent back- 

 ward flow of serum. Massage is now applied if 

 required, the site of injection is again dampened 

 in antiseptic, and the pig is released. 



Choice of the site of injection is governed by 

 the size, condition and intended use of the animal, 

 by the method of confining, and by individual 

 preferences. All other things being equal we pre- 



