NINTH ANNUAL YEAR BOOK— PART III 105 
Question : What is the cause of hog cholera ? 
Dr. Bougiiman: It is some specific agent, but at the present 
time they don't know what it is. 
Question: Don't hogs have any other disease but hog cholera? 
Dr. Boughman: Yes, hogs have other diseases, but the disease 
on which the government has been experimenting the most, and for 
which they have found a treatment or preventive, is swine plague or 
hog choelra. It is commonly considered contagious, but it is infec- 
tious and possibly not contagious, because it is a fact that a man's 
hogs on the other side of the fence from where they are dying do 
not take the disease The active agent must be carried from one 
animal to another ; it is not an agent that flies in the air. I do not 
think we have very many diseases outside of hog cholera that are 
very destructive . 
Question: I wish you would give us the diagnosis and the ap- 
pearance of the animal that is taken with hog cholera, and also of 
the disease know^n as swine plague, together with the other diseases 
that attack the hog on the farm. 
Dr. Boughman: In an outbreak of hog cholera you will find a 
difference in its expression. • Some hogs have lung trouble; others 
ulcer of the intestines; others have the ears affected, or will be 
red all over the body. 
Question : Isn 't there a peculiar odor ? 
Dr. Boughman : Any sick hog has a peculiar odor that is char- 
acteristic to the hog and not of the disease, I think. 
Question: After a hog dies from any cause I very often open 
and examine it. AVhat organs should I examine for hog cholera or 
swine plague ? 
Dr. Boughman: You should look at all the organs. You may 
find just an affection of the lungs, or an ulceration of the intestines, 
or both ; but the place to look is in the lungs, the intestines and the 
kidneys. In regard to. the lesions that we find in hog cholera after 
a hog is dead, I think the government inspector, Dr. Chester 
Miller, who is here, can give us some idea on that. 
Dr. Miller : There is no definite, very plain symptom, except the 
way the hog acts. With us at the yards, we may see a bunch of 
hogs come in of which some will lag behind a little. If on following 
them into the pens they go to eating or drinking, and then go over 
