FIFTEENTH ANNUAL YEAR BOOK — PART IX. 651 



ease was brought in they would die just as they would before. You 

 must have something permanent if you want protection. 



A Member: Is the hog cholera serum made in such a way that 

 when you use it, you would not be giving your hogs some other dis- 

 ease, say tuberculosis, or something of that kind? 



Doctor Stange: I might say in connection with the manufac- 

 ture of hog cholera serum, that the hogs are all tested for tubercu- 

 losis before they go into the serum production, and every hog is 

 posted after it is through being used, to see that there is nothing 

 wrong with it; so that we feel that there is very little possibility 

 of disease being transmitted by the serum unless you are near a 

 stockyard. That is one of the objections I have to a serum plant 

 near a stockyard. 



Mr. Cockerill: You keep the product of each hog separate all 

 the time? 



Doctor Stange : Yes ; until the hog is posted. 



A Member: Can Ames furnish the serum at the present time? 



Doctor Stange : Not as much as the demand is. We have made 

 over 900,000.000 cubic centimeters. "We do business with the 

 farmers directly, and the demands under those conditions have 

 been so great that we couldn't supply them. 



J. E. Doran: I have a few dead hogs lying around the place. 

 I see the hogs have apparently the same disease that they had last 

 year, and I have lost probably less than ten in the last sixty days, 

 and no serum of any kind has come onto the place. There are 180 

 hogs that weigh 100 pounds and more, alive and doing well, and 

 100 or more pigs, healthy and strong. How do you account for 

 this condition of affairs without the assistance of serum? 



Doctor Stange : May I ask if those were pigs from immune sows 

 last year? 



Mr. Doran : I had thirty som^s left after last year. We had 150 

 pigs from those sows. They all lived and did well for about a 

 month or two; then they all died but six. These same sows have 

 healthy pigs now. 



A Member: Do you know that you have hog cholera on your 

 place? You might have some other disease that is killing your 

 hogs. 



Mr. Doran : There are some of the old hogs lying around from 

 last year. 



Mr. Cockerill: When did you quit burning them? 



Mr. Doran: When they quit dying. I suppose I have dried hog 

 cholera on those hides. 



