Fowl Cholera Vaccines and Bacterins 
11 
Summarizing the results of the preceding series, we find as 
follows: (Table VIII.) 
TABLE VIII 
Number of chickens of 
which immunity was 
tested 
Number of bacterin 
or vaccine 
injections 
Results 
Chickens 
sick or dead 
Chickens 
immune 
18 
1 
. * 18 
0 
25 
2 
25 
0 
57 
3 
56 
1 
100 
99 
1 
It is evident from the above that no reliance can be placed 
on the vaccines and bacterins against fowl cholera, which we are 
able to find on the market and subject to definite tests. We have 
no doubt as to the possibility of artificial immunity as an aid to 
the control of fowl cholera, but as yet we will have to get along 
with the more non specific means of prevention, even if those 
are far from a universal efficiency. 
(5M) 
