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My object in preparing this book has been to place in the hands of those who handle hog cholera definite and authoritative information regarding the disease. There are abundant publications dealing with hog cholera but for the most part they consist of technical papers covering certain restricted phases of the disease, or of attempts to circumscribe the entire subject in the scope of a few pages. Neither meets the needs of the man who must handle hog cholera in the field. Moreover these publications appear as bulletins or as special papers in technical journals, and usually they are not at the veterinarian's command at the time he needs them.
We are rapidly discarding the old belief that any one who can use a hypodermic syringe can cope with hog cholera. Questions constantly arise regarding diagnosis, complications, when or whether to immunize, which method to use, the subsequent care of the herd, the handling of young pigs, slaughtering from infected herds under inspection, and many other individual problems.
The effective handling of hog cholera, like the handling of other diseases, is founded on exact knowledge of the malady itself, but hog cholera differs from other infectious diseases in that preventive vaccination against it has served to open the new field of swine practice.