Swine Growers' Session. 



January 6, 1909, 



THE CONTROL OF HOG CHOLERA.* 



(By J. W. Oonnaway, Professor of Comparative Medicine and Veterinarian of the 

 Missouri Agriculture Station, College of Agriculture, University of Missouri.) 



Mr. President and Gentlemen of the Swine Growers' and Breeders' 



Association : 



At the meeting of this Association held a year ago I gave 

 a brief history of the researches on hog cholera that had been 

 made in this country by a number of investigators ; some connected 

 with the National Department of Agriculture, others working in 

 the State departments. Particular attention was directed to the 

 more recent and very important work of Dr. Dorset and associates 

 of the U. S. Bureau of Animal Industry on the etiology (cause) 

 of hog cholera ; and to their subsequent work on immunity against 

 that disease — researches which I am confident furnish a sound 

 basis for the practical solution of the control of hog cholera. I 

 also reported in some detail the experiments which we have car- 

 ried out at the Missouri Experiment Station in co-oparation with 

 the U. S. Bureau in testing the immunizing value of the blood 

 serum of swine made "hyperimmune" to hog cholera. As this 

 was published in the last annual report of the State Board of 

 Agriculture, and in an Experiment Station pamphlet (circular No, 

 29), as well as by a few of the leading live-stock and farm jour- 

 nals, from which extracts have been widely copied by the popular 

 press, it will not be necessary to give the details of that work at 

 the present time. 



The result of these experiments and the wide-spread interest 

 which has been aroused among the breeders, swine growers, and 

 feeders not only of Missouri but of a large number of other states, 

 has brought to us an overwhelming number of inquiries for fur- 

 ther information, and requests for the "immunizing serum." I 

 have thus been very forcibly impressed with the fact that hog 

 cholera is indeed a live question. It is probable therefore that 

 nothing which I can present to you today will be more acceptable 

 than a talk on the practical phases of the control of this disease, 

 and particularly the part which "preventive inoculation" is to take 

 in that work. 



*Revised to include data up to time of pubJicntion. 

 A— 19 



