902 
B. O. MINGE. 
gins to return, the movements of the hind quarters are very 
stiff, mastication is difficult, the voice is husky, the muscular 
masses are painful, the pig will lie extended on its side, alvine 
ejections are passed involuntarily. In the last stages, oedema 
is found in different parts of the body, and is the cause of death. 
The symptoms will only be found when there is an extraordi- 
nary number of trichinae ingested. When there is a small num¬ 
ber ingested it is not dangerous, and the pig may recover, but 
remains lazy and sluggish. Also the pig will fatten. The diag¬ 
nosis of a case of trichina is only aided by the use of Drechunes’ 
histological punch, or Middledropf’s trocar. By either of the 
above-named instruments a person is enabled to draw a portion 
of the muscles from the hind quarters of the living pig. With 
this portion of muscle an examination can be made for trichinae. 
There is no very great danger in this operation. To make a 
thorough diagnosis of a case it requires the closest attention. 
There are cases of trichina that are never noticed, and the pig 
fattens all the time. It is principally observed when man eats 
the infested pork and develops a case of trichinosis. It is very 
important that some means should be discovered by which it 
could be cured, thus destroying the muscular parasites. It is, 
though, relieved to a certain extent by prophylactic measures. 
The only treatment for trichinosis is preventive treatment. Be 
very careful that the pig does not receive any raw slops or 
bodies of rats. The extent of trichinosis in the United States 
is caused by the food the pigs receive, that is, the waste matter 
of all kinds, etc., which are very favorable for the development 
of trichinae. The increase of trichina is also due to their re¬ 
markable vitality ; thus it is very important to know if the tri¬ 
chinae are dead or alive. This may be ascertained either : (i) 
By heating the trichinae, which are placed on a platinum plate 
and heated to a temperature of 35 degrees to 40 degrees C., or 
(2) By giving infested flesh to an animal that it will develop in 
two or three days. In the first case, if the trichinae are living 
they will be seen moving. In the second, the trichinae will de¬ 
velop in the intestines ; the male and female will be formed ; 
