172 Diseases of the Respiratory Organs. 
the dog. The offender is a formidable-looking object, a 
representation of which is given in the accompanying 
figure. It is the mature form of the parasite common to 
man, the horse, and other animals indigenous to various 
parts of Europe, in which it occupies 
the digestive organs, &c., and is 
known as the Pentactoma denticula- 
tum. Dogs frequenting butchers’ 
‘shops, slaughter-houses, and horse- 
slaughterers’ yards gain access to the 
viscera which contain the parasite. 
It is taken to the mouth, where it 
attaches itself by powerful hooklets, 
and eventually cra wlsto the nostrils ; 
some indeed pass direct, first attach- 
ing themselves to the outer side of 
the lips, &c. Armed with formidable 
and powerful hooks, they set up 
violent irritation as they migrate to 
and from the various passages, 
causing the sufferer to push his nose 
Pentastoma Denticulatum ito the soil, or rub it with his feet ; 
(after Kiichenmeister). he also sneezes, champs the jaws, 
rolls violently on the ground, or 
. passes into a violent convulsive fit, 
in one of which he sometimes dies. The parasite 
requires twelve months to develop, during which it thus 
tortures the dog whenever from any cause it is obliged 
to change its quarters by cold or frost, of which it 
appears to be peculiarly susceptible. The effects of its 
residence in the nasal chambers of the dog are inflamma- 
tion, thickening, and probably ulceration of the lining 
membrane, with more or less disease of the turbinated 
bones, and even harder structures. 
Treatment.—Inhalation of various volatile substances, 
fluids, &c., as iodine, chloroform, chlorine gas, tobacco 
smoke alone or combined with other agents. The 
application of iodoform may be effectual. Sometimes 
these are useless, as the parasite is located within one of 
the sinuses. When such is the case, and the exact 
