896 
B. O. MINGE. 
various wound infections, they must be of some significance in 
throwing their weight of evidence on the side of some previous 
investigations and possibly prove an incentive to further work 
on this subject. 
TRICHINA. 
A Thesis Presented to the Faculty of The McKieeip Veterinary 
College by B. O. Minge. 
The worm trichina was discovered about 1828. It has been 
thoroughly investigated and studied since that date. Trichina 
is an animal parasite that is found in all animals. It is a small 
worm, which when in the larval state is parasitic, both in the 
muscles and in the walls of the intestines of man and the pig. 
It produces a disease known as trichinosis, or trichiniasis, which 
is nearly always fatal in man and in the pig. There is only 
the well-known species trichina spiralis . This you might say 
constitutes the family of the tnchinidce. When in the .adult 
state the trichinae are found in the intestines alone ; further¬ 
more, they are not visible to the naked eye. 
Commencing at the middle of its body it gradually tapers 
to a point. The skin of the parasite is very smooth and even. 
The mouth is terminal, small, and has no projection. It is 
provided with a digestive tube, which comprises (1) a buccal 
intestine, (2) a middle intestine, and (3) a terminal intestine. 
The male trichina is distinguished from the female by having 
at its posterior end two digiform appendages on each side of the 
cloaca. The male trichina is from 1.4 nmr. to 1.6 nmr. long, 
40 u. wide. At the time of sexual intercourse the cloaca is 
everted and acts as a copulatory organ. The male repro¬ 
duces by the testicular tube, which doubles back upon itself 
and ends in a canal. This canal opens into the cloaca at the 
same time the intestine does. The female trichina is 3 nmr. 
long, 60 w. wide. It has only one ovary, which is composed of 
a tube that begins as a caecum near the anus and runs up to 
