2 BULLETIN" 340, TJ. S. DEPARTMENT OF AGRICULTURE. 
the soil with the virus by the proper disposition of the carcasses of 
animals that have died of the disease, the destruction of the virus 
contained in the soil by its proper drainage and cultivation, and the 
prevention of outbreaks through the immunization of the susceptible 
animals. 
In order to attain the greatest success in the control and eradica- 
tion of the disease, it would appear that the best results can be ac- 
complished only through proper attention to all of the above factors. 
The execution of these measures would require the earnest coopera- 
tion of the stock owners, but even then, on account of the peculiar 
geographical conditions of certain parts of the country, the drainage 
and cultivation of the land would not always be feasible, and our 
efforts must therefore be directed principally toward the sanitary 
measures and protective vaccination. The enforcement of proper 
sanitary police regulations in connection with the control of anthrax 
would no doubt effect a material reduction of the disease, but un- 
fortunately it is rather a difficult task to obtain the cooperation of 
the interested parties. 
The proper disposition of the infective material, particularly the 
carcasses, should be considered of the utmost importance, since such 
material constitutes the greatest source of danger toward the spread- 
ing of the disease. Drainage from the soil polluted by infected 
carcasses may carry the infection to distant points and deposit the 
spores over large areas hitherto uninfected. Buzzards and other birds 
(Dalrymple), dogs, and even flies may also carry the infection from 
such sources into iminfected localities. Therefore, in an effort to 
control the disease, an educational propaganda must be carried out 
and stringent compulsory measures adopted for the proper disposi- 
tion of the infective material from premises where the disease appears 
among the stock. 
PROTECTIVE VACCINATION. 
A material reduction and a checking of the disease may be suc- 
cessfully accomplished by periodical vaccination of all stock in in- 
fected localities. This method, even if practiced alone, would have 
splendid results in minimizing the losses from the disease in anthrax 
localities. However, such vaccination must be carried out regu- 
larly and irrespective of whether the disease has already appeared 
on the premises. 
Fortunately we have at our command various methods of vacci- 
nation which have proved highly efficient in the production of im- 
munity from anthrax. As a matter of fact, this was one of the first 
infectious, diseases in which protective vaccination was successfully 
demonstrated, and we are indebted to Pasteur for devising the pro- 
