650 IOWA DEPARTMENT OF AGRICULTURE 



A Member : I would like to ask if there is any way that the 

 farmer can have assurance of getting potent serum? 



Doctor Stange : On July 1st, following the establishment of 

 the State Biological Laboratory at Ames, the United States Bu- 

 reau of Animal Industry was given authority to supervise the 

 manufacture of hog cholera and all other biological products for 

 veterinary use, and they are now maintaining government in- 

 spectors at Kansas City and Sioux City, and, in fact, in connec- 

 tion with all plants that have a government license. No plant can 

 ship any product frbm one state to another unless it has a govern- 

 ment license, and when they have it, they are under rigid super- 

 vision or inspection. I might say that it cost one company in 

 Kansas City $5,000 to settle up with some of the farmers, and 

 three or four licenses have been revoked, and there are two plants 

 with suspended licenses now. Of course we can't take up matters 

 that don't come to our attention, but when they are reported to us, 

 we take up the matter immediately with the plant, and determine, 

 if possible, where the trouble was. I want to say in this connec- 

 tion that a product that is used so extensively as hog cholera serum 

 will never give perfect results in every case. That would be an 

 ideal condition, but it is something you can't realize, because the 

 conditions of the herd, the care given them, and all of those things 

 have an influence; and so long as hog cholera serum is used, there 

 is going to be an occasional herd where you will have trouble. You 

 can't get away from that any more than you can get away from 

 the fact that a man who is vaccinated for smallpox will sometimes 

 have trouble ; it all works on the same principle. 



Mr. Cockerill : You recommend the simultaneous treatment ? 



Doctor Stange : That is what we generally recommend. 



Mr. Cockerill: And you know some people in the state of Iowa 

 Ihat disapprove of if? 



Doctor Stange : Of course there is a difference of opinion on 

 that. 



Mr. Swearingen : How large a dose would you recommend for 

 250-pound hogs ? 



Doctor Stange : Seventy cul)ic centimeters. 



The Chair: Suppose a township didn't have hog cholera; there 

 wasn't any of it close by, but they should give the serum alone 

 treatment — would that be sufficient ; would it clean it up ? 



Doctor Stange: No; that immunity would last from four to six 

 weeks, and then your hogs would be infectious again; if the dis- 



