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BULLETIN 646, U. S. DEPARTMENT OF AGRICULTURE. 
(c) Prevention is the better treatment. Separate sick animals from 
the herd at once. Vaccinate (figs. 14 and 15) the apparently healthy 
hogs with antihog-cholera serum. This serum only protects the 
hogs against cholera. It is a preventive and in no wise a cure. It 
is advisable to take the temperature of the hogs. This should not 
be more than 104° F. 
Burn or bury the carcasses of hogs that have died with the disease, 
disinfect all pens and yards' after an outbreak of cholera. Burn all 
manure, litter, and straw, then apply a coat of coal tar. Pens should 
be situated so that they can be properly drained and cleaned. 
Fig. 15.— Injecting the serum in the flank. 
Proper feeding, plenty of exercise, clean pens, and an abundance 
of sunshine will do a great deal toward protecting hogs from cholera. 
Study questions. — What steps should be taken to prevent diseases 
of hogs ? What diseases are most commonly found in the commun- 
ity ? What diseases have proved most serious ? What methods have 
been employed to prevent or to eradicate diseases ? What type or 
types of dipping vats are used in the community ? Have each mem- 
ber of the class describe a vat that is used at his own home or at the 
home of a neighbor. 
Practical exercises. — Make a study of the diseases of hogs in the 
community for the preceding year with reference to the following 
