144 DISEASES OF THE HOG. 
less from the effects of the effete matters being 
penned up in the system, and therefore valuable 
sows and boars should have their skins thoroughly 
cleaned occasionally, thus preventing disease and 
keeping off vermin. 
CANKER OF THE NOSE AND FACE (SORE NOSE.) 
This is a form of skin disease which usually 
affects the nose first and by degrees spreads up the 
face and sometimes over the ears and in patches 
on the body. 
Causes: It is the résult of a parasite which re- 
sembles that of mange, but seems to have poison- 
ous properties. As it spreads the part becomes of 
a cankerous nature, causing constitutional symp- 
toms and death. Itis not as yet known where this - 
parasite originates, as I have found it affecting 
pigs where the sanitary conditions were good. I 
have made a number of experiments to find the | 
origin of the parasite, but have found nothing sat- 
isfactory. 
Symptoms: The first thing noticed is a contrac- 
tion of the skin which wrinkles, giving the nose a 
short, stubby appearance. The animal rubs its 
nose on the earth, snuffles and runs as if it wanted 
to get away from something. By degrees it breaks 
out in sores, which may extend up to the eyes and 
ears and in some cases form hard patches on the 
belly. I have seen cases of long standing where 
the parasite buried deep into the muscles of the 
face so that a slough would take place clean to the 
bone of the jaw, leaving cankerous edges to the 
