ANTHRAX 75 



with 4 c.c. of immune serum ; five minutes later they 

 are injected on the opposite side ^Yith 0*5 or 0*25 c.c. 

 of an attenuated culture, washed in salt solution, the 

 degree of virulence of which corresponds with Pasteur's 

 second vaccine. This method has the great advantage 

 of only requiring a single treatment of the animals, 

 and the results obtained from it are quite satisfactory. 

 In Argentine and Uruguay this method of vaccination 

 was employed from the spring of 1904 to September, 

 1905, on 140,000 cattle, 30,000 sheep, and 2,000 

 horses. According to Sobernheim no fatalities resulted 

 from the vaccination, and almost everywhere a com- 

 plete eradication, or at least a marked restriction, of 

 anthrax was noted. In this country, where outbreaks 

 of anthrax are continually occurring, I consider it 

 the duty of all practitioners to acquaint their clients 

 with the protection afforded to their stock by vaccina- 

 tion. Every stock-owner knows the results obtained 

 from black-leg vaccination, but few are aware that 

 almost the same protection can be gained against 

 anthrax by vaccination against the disease. 



Black-leg, Black-Quarter, Quarter 111.— Black- 

 leg is an acute infectious, but not contagious, epizootic 

 disease of cattle, and exceptionally of swine. 



Etiologij.— The black-leg bacillus, B. Chauveaui. 

 Black-leg is a very common disease, occurring chiefly 

 among cattle. At the present time there are 

 available at least five biological products for the 

 prevention and cure of this disease. 



