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The Bulletin. 



raisers of the State at approximate cost. We are now charging 2 cents per 

 cubic centimeter. The amount of serum needed to inject the different weights 

 of hogs is as follows :• 



Q. Do you think that vaccinating pigs in the bed, having seen no evidence 

 of cholera on the premises, will he tcorth the trouble and expense? 



A. It would depend upon how near cholera is to your hogs and the proba- 

 bility of their becoming infected. The immunity conferred lasts only for six 

 to eight weeks. If cholera is not in your community. I do not think it would 

 pay, as it would be necessary to reinject in six or eight weeks. 



Q. IIoic long can yon keep the scrum? 



A. If the serum is held at a low temperature. 40° to 45° F. and kept in a 

 dark place, it can be kept almost indefinitely. At a high temperature it would 

 not keep more than a week or ten days. 



Q. Can hereditary immunity be produced by giving hogs continued injections? 



A. It seems to me that the use of the serum long enough will pi-oduce a race 

 of hogs immune to cholera. Where the simultaneous method is used with 

 large doses of the virus we find that immunity is transferred to the offspring, 

 but this will not last very long. I have at the serum plant now forty or 

 fifty pigs four, five, and six months old. which have never been treated with 

 the serum. They have been with hogs sick with cholera every day since they 

 were farrowed, but have not. as yet, developed cholera. The dam and sire of 

 those pigs are both highly immune to cholera. I have injected as much as 

 3,000 cc. of virulent blood into them without causing any ill effect. 



Q. Will the vse of the serum for several years produce a hog thoroughly 

 immune? 



A. No, not using the serum alone. The tendency would be to revert back 

 to the original form, and then the hogs would not be immune to cholera. 



Q. What is the best thing to do with hogs that have died with cholera? 

 A. The best thing to do is to burn them ; but if you cannot burn them, dig a 

 deep hole, bury them and cover them with lime. 



fj. What is the best disinfectant ? 



A. Any of the coal-tar disinfectants, or lime will answer most of our needs. 

 The best of all is to rake up everything and burn it and cover the ground 

 with a heavy application of lime. 



Mr. Shuford: The next tiling on the program is an address on 

 ''Dairying as a Business," by Mr. Hehner Eabild, of the United States 

 Department of Agriculture. To my mind, there is no more important 

 subject in North Carolina than the raising of our own live stock and 

 our own dairy cattle and making our own milk and butter. 



I beg to introduce Mr. Eabild, of the United States Department of 

 Agriculture, who comes to talk to us on "Dairying as a Business." 



