vaccination introduced into 1 ml of the blood serum, the number 
of anti-bodies increased to such an extent that it was sufficient 
_ to neutralize 117 dozes of the infective virus. 
The experimental data confirms the practical observations, 
The effectiveness of the saponin vaccine depends on the age of 
the animals and periods of their vaccination, as illustrated in 
fable 1. ,; 
The data given in the Table, illustrates that the vaccine 
is not very active in 2 to 10 month old sheep. 
TABLE = 1 
THE EFFECTIVENESS OF THE SAPONIN VACCINES 
Animals that have 
tn Age of the 
4 eerie ation retin developed the foote 
ener (nents) amelie disease 
tion), days. ted areas! gota) Percentage 
heads from the 
total nurber 
of cattle 
head in the 
areae 
4«- 19 Veal: 370 a 0,3 
ow a 4345 26 i) 
2« 10 4334 1032 23,3 
20 = WD Younger cattle 
43s 36 794 75 9," 
2 = 10 2194 580 26,0 
68 - 90 ~=— Veal: 370 9° 2,4 
Younger cattle 
12 = 36 677 3h 9,0 
