ETIOLOGICAL MOMENT OF AMERICAN SWINE PLAGUE. 169 
accompanied by the usual acute parenchymatous process in the 
chief organs in the body, liver, spleen and kidneys. Notwith¬ 
standing the fact that Law and some other observers report no 
lesions in the kidneys, every competent observer will find those 
organs the seat of acute parenchymatous disturbances in every 
case of natural infection ; the cortex being opaque, anaemic and 
of a yellowish-gray color. 
In a brochure entitled JDie Schwindsucht bei Schweinen ” 
(phthitis in swine), 1875, under the heading u scrofulous enteritis,” 
Roloff has described lesions in the large intestines which he thinks 
belong exclusively to that disease, but which, as will be seen, also 
occur in American swine plague. 
As can be seen by reference to Dr. Bowhill’s paper, the ab¬ 
sence of these lesions in Schuetz ? s autopsical report was the reason 
that I then doubted the identity of the German swine plague 
with American. I then held skeptical views as to the pathogno¬ 
monic value of these lesions from missing them in the majority of 
cases of natural infection upon which I had then made autopsies. 
As said previously, both experimental and field necroscopical ex¬ 
periences have since confirmed my skepticism more strongly ; of 
which more in another paper. 
It would be unjust to the facts not to say that Hueppe is in¬ 
clined to look upon these lesions as belonging to the “wild- 
seuche ” in German swine, and hence to the German swine plague 
which he claims to be identical with that disease. It would seem 
that this question must be settled in Germany, as, if Roloff is cor¬ 
rect, they seem to have more phthisis among their swine than we 
do. It must also be remarked that Roloff, who was a most dry 
and exact observer, does not describe a single lesion in the lungs 
or lymph glands that has been described by others, or as yet seen 
by me in American swine plague. He invariably speaks of the 
lymph-glands as “ enlarged, but full of caseous centers.” 
The pneumonia of the American swine plague is invariably of 
a bronchial—caseous—type, often leading to gangrenous processes, 
but even in such cases I have failed to find caseous centers in the 
lymph-glands, and have invariably found the previously described 
swollen and hemorrhagic condition. If Roloff be correct, then the 
