188 HOG CHOLERA 



be given the show animals. Not infrequently the 

 practitioner has the question of immunization 

 thrust on him as an eleventh-hour consideration 

 just on the eve of the departure of show hogs for 

 the fairs. In this event he has no legitimate 

 choice but to protect the animals with serum 

 alone during the period of probable exposure. 



ORDERING SERUM 



Every veterinarian in country practice is likely 

 sooner or later to be called on to immunize swine 

 against hog cholera, and because much immuniz- 

 ing consists of emergency work, serum must be 

 procured without delay. For this reason the vet- 

 erinarian should establish relations with a reput- 

 able laboratory near at hand so that telegraphic 

 orders from him will be filled promptly. Because 

 they cannot assume responsibility for products 

 that have been in other hands, most laboratories 

 will not allow credit for returned serum and virus 

 and thus it is desirable to order the exact quanti- 

 ties required. 



Before ordering serum the veterinarian should 

 ascertain the number of hogs to be vaccinated, and 

 their approximate weights. A representative list 

 would appear thus: 



1 boar, weight 600 pounds 



8 sows, weight 400 pounds each 



65 pigs, weight 20 pounds each 



50 shoats, weight 60 pounds each 



