PARASITE DISEASES 1 85 



kept filled in. The sleeping quarters should be kept 

 clean and disinfectants used freely. Other meas- 

 ures as recommended in the treatment of intestinal 

 worms should also be used. 



Medicinal treatment is of little value. Inhalation 

 of tar, or turpentine fumes, may be used, but the 

 general use of such lines of treatment is unpractical. 

 The best and most practical method of treating 

 lung worm diseases is good care, nourishing food 

 and hygenic surroundings. 



TRICHINOSIS 



Trichinosis is a disease of the muscular tissue of 

 the body caused by a small round worm, the 

 Trichina Spiralis (Owen). It occurs in two forms 

 in animals — the intestinal, which represents the 

 adult worm or perfect stage, and the muscular, which 

 represents the larval stage. From one to three per 

 cent, of the pork that is inspected in this country 

 is said to be infested with this parasite. 



Source of Infection. — Hogs become affected by 

 eating rats that are infested with the larval form. 

 According to the investigations made by Stiles, rats 

 around the country slaughter-houses are quite gen- 

 erally infested with trichina, due no doubt to the 

 careless way of disposing of the offal at such places. 

 Hogs also have an opportuaity to feed on the offal 

 and become infected. 



Flesh containing the larval trichina, when taken 

 into the digestive tract, is acted on by the digestive 

 juices, and the young parasites are liberated. With- 



