HOG CHOLERA. 
19 
“ The microbe of Marseilles differs from that of Schiitz by its 
motility, that of Lofffer-Schiitz being non-motiie. The disease of 
Marseilles seems also to differ from the schweineseuche by the ab¬ 
sence of oedema at the point of inoculation, by slower progress 
of the disease, by the pathological phenomena being found in the 
intestine almost always, while Schiitz observed almost nothing in 
the intestine and never mentioned ulceration.” 
In a subsequent paragraph he adds, that my hog cholera mi¬ 
crobe certainly differs much more from those of septicaemia of rab¬ 
bits, schweineseuche of Loeffler-Schiitz, wildseuche of Kitt and fowl 
cholera of Perroncito and Pasteur than these germs differ from 
each other. 
The germ discovered by M. Rietsch at Marseilles is very 
closely allied to our hog cholera microbe and probably differs no 
more from it than specimens of our germ differ when obtained 
from different outbreaks in this country. 
Dr. Cornil, who is now a member of the French Senate and 
who certainly is one of the very highest authorities on micro-or¬ 
ganisms in France, writes me under date of Feb. 10, 1888, as 
follows : 
a ¥e have had occasion to study, M. Chantemesse and I, the 
disease of swine that you described two years ago under the name 
of swine plague and in your last volume under the name of hog 
cholera. We have observed an epidemic in June last at Paris, 
and at the end of the year another epidemic at Marseilles. We 
have verified the accuracy of your description and we are about 
making experiments of vaccination.” 
I have one other letter to which I attach the very greatest 
importance, because it comes from the highest authority in the 
world on pathogenic bacteria. Under date of Feb. 23, 1888, Dr. 
Robert Koch writes: 
“ The culture of hog cholera bacteria sent to me came in good 
condition, and I directed Dr. Esmarch, one of the assistants in 
the Hygienic Institute, to make a few experiments with it. He 
was able to confirm all of the results obtained by you in inocu¬ 
lating and feeding mice and guinea-pigs. This micro-organism 
does not correspond with any of the species of pathogenic bacteria 
known here, particularly not with those found in swine diseases. 
