BACILLUS ANTHRACIS SYMPTOMATICI. 567 
most virulent material and from the disease. Fourteen 
days are allowed to elapse between the two inoculations. 
The results obtained from this method of preventive in- 
oculation seem to have been very satisfactory. Accord- 
ing to the statistics of Hafner, Luchanka, Hess, Strebel, 
etc. (1885-93), including many thousand cattle treated, 
the mortality, which among 22,300 non-inoculated cattle 
was 2.20 per cent., has been reduced to 0.16 per cent. 
in 14,700 animals inoculated. 
To recapitulate briefly, the principal points of differ- 
entiation between this bacillus and the bacillus of malig- 
nant wdema, which it closely simulates, are smaller; it 
does not develop into long threads in the tissues; it is 
more actively motile, and forms spores more readily in 
the animal body than does the bacillus of malignant 
cedema. It is pathogenic for cattle, while malignant 
cedema is not; and swine, dogs, rabbits, chickens, and 
pigeons, which are readily infected with malignant 
cedema, are not, as a rule, susceptible to symptomatic 
anthrax. 
