why 1 pasteur’s vaccine fails to prevent hog cholera. 239 
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RESUME OF DIFFERENCES BETWEEN HOG CHOLERA AND ROUGET. 
Hog Cholera. 
Period of incubation from live to 
venty-one days; average in summer 
jven days and in winter fourteen days. 
Average duration of disease eight to 
;n days. 
Proportion which die from feeding 
t pon organs of diseased animals, 90 per 
snt. 
Average period between such feeding 
ad death fifteen days. 
Guinea pigs very susceptible, pigeons 
sfractory. 
Ulcers of large intestines almost con- 
ant ; skin symptons exceptional. 
Bacillus of rouget not present, but in- 
ead of it an entirely distinct microbe. 
Rouget. 
Period of incubation from one to six 
days; average three days. 
Average duration of disease two days. 
Proportion which die from feeding 
upon organs of diseased animals, 20 per 
cent. 
Average period between such feeding 
and death four days. 
Pigeons very susceptible; guinea pigs 
entirely insusceptible. 
Inflammation of skin almost constant; 
ulcers in large intestines very rare. 
Caused by a fine bacillus, well known 
and easily demonstrated. 
J 
In the above we have attempted to give an unbiased state- 
lent of the reasons which have led us to consider rouget as an 
ntirely different and distinct disease from our hog cholera, 
’liese reasons appear to justify this view, and the differences 
ointed out are so radical that we are unable to harmonize them, 
'he fact of the plagues being caused by two distinct germs is of 
self sufficient to separate the diseases; but if we did not know 
lis or refused to admit it there still remains sufficient differences 
i the other characters to make it necessary for us to consider 
lem as distinct maladies. 
Here, then, is the true reason why Pasteur’s vaccine fails to 
revent hog cholera—it is the virus of another and an entirely 
istinct disease, and as an attack of one disease does not protect 
•om another disease, so Pasteur’s virus cannot prevent hog 
| holera. 
Since writing the above we have received the latest report of 
le German Imperial Health Office, and in that we find a report 
t investigations of sbhweineseuche (swine plague) by Dr. Schutz, 
hich furnishes complete and unequivocal confirmation of our 
ews. He has demonstrated that schweineseucfie and rotlilauf 
•e entirely distinct diseases, with different symptoms and caused 
y different species of microbes. We commend that report to 
le careful consideration of the gentlemen who have felt so cer- 
in that we were wrong in making a distinction between rouget 
