We know that pigs from immuned sows are themselves immune 

 so long as they are subsisting alone on their mother's milk, but that 

 as soon as they begin to eat other food — which is at 14 to 18 days 

 of age — they become susceptible to hog cholera. 



Looking at it from every phase, our advice is as follows : 



1. Unless the pigs are in actual danger of hog cholera defer vac- 

 cinating them until they are weaned. 



2. If cholera infection is already on the farm or in close proximity 

 thereto you are justified in vaccinating with serum alone. 



3. If forced to vaccinate suckling pigs, you should revaccinate 

 after they are weaned in order to insure life immunity. 



4. A pig is never too young to vaccinate if it is in immediate dan- 

 ger of hog cholera. 



Treatment Before Vaccination. 



Hogs that are to be vaccinated should be kept in as cleanly and 

 sanitary manner as possible before the operation. This would of course 

 mean that they should be kept away from dust, manure and wallow 

 holes. It is best to have them empty at time of operation as the usual 

 danger attending the handling of "full hogs," such as rupture of 

 internal organs, blood vessels, etc., will thereby be eliminated. 



Virus bottles will be labeled as follows : 



§f 



HOG CHOLERA VIRUS 



DEPARTMENT or AGRICULTURE 



STATE or TENNESSEE 



T. F. PECK, commissioner G.R.WHITE, state veterinarian. 



For Dosage See Label on Serum Bottle. 



CAUTION 



Virus is perishable and should be kept on ice until used. 

 The dose should be measured accurately. Extreme care should 

 be exercised in disposing of all Virus not used. It should be burned. 



Do not use contents of this package after. 191 — _ 



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