20. Do not spill any virus on the premises. That which is not 

 put into the hog should be kept in the bottle. 



21. Don't let any person who has not visited a serum plant and 

 there received special instructions vaccinate your hogs, and don't at- 

 tempt to do so yourself without receiving the necessary instructions. 

 People are not born with knowledge of this kind. It must be acquired 

 and the best place to acquire it is at a serum plant under direction of 

 an expert in this line of work. 



-•_'. Serum is a protective agent against cholera. It will prevent 

 cholera in ioo per cent of cases. We do not here lay any claim for it 

 being a specific treatment for hogs already sick of the disease. How- 

 ever, we feel safe in saying that even in sick herds the losses after 

 proper vaccination will not exceed 50 per cent. Don't wait until they 

 are sick to vaccinate, as at this time it requires large doses of serum 

 and is otherwise expensive. The proper time to vaccinate is before 

 the pigs exceed twenty-five pounds in weight, as at this period they 

 only require a small dose of serum and can be protected for life at an 

 expense of twenty-five cents per head. 



23. Avoid exciting and crowding hogs before treating, as this tends 

 to increase the temperature. 



24. Wash mouth of bottles before opening. 



26. Fig. 33 shows proper method of restraint for large hog-. 



28. Avoid the bone when inserting the needle. 



29. I lave helpers to catch and hold the hogs. The operator should 

 confine himself to the actual operation. 



30. Don't hurry. 



31. Don't expect anti-hog-cholera serum to protect hogs against 

 cottonseed meal poison. lye poison, pneumonia, etc., as it will not do it. 

 It is made to protect hogs from cholera, and none other. 



32. With proper assistants one man can easily vaccinate [50 to 

 250 hogs in ten hours. 



33. Don't vaccinate hogs for ten days after castration or any other 

 surgical operation and do 1 1 * » t castrate or perform any other surgical 

 operation for ten days after vaccinating. Of course, where the hogs 

 are in immediate Sanger of cholera infection, the above does not apply. 



34. Pigs are never too y< >ung t< 1 vaccinate, 1>\ either the serum al< me 

 or simultaneous method, if they are in danger of cholera infection. I'>e 

 sure and give \er\ young pigs enough serum. It requires more serum 

 in proportion to weighl to protect young pigs than older hogs. 



35. I) n't fail tO take temperature- in sick herd-. 



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