152 The Farmer's Veterinary Adviser. 



rib, but has been found in the air-passages, the heart, the 

 Teius, the mesentery and elsewhere. In many cases no 

 impairment of the health is observed. But irritation of 

 important organs like the kidney or liver may lead to weak- 

 ness of the hind parts, diarrhoea, or even blood-poisoning 

 and sudden death. It seems not improbable that the at- 

 tacks of this worm in the liver may produce a disorder 

 which is confounded with Hog Cliohra. Its presence in 

 the kidney may sometimes be recognized by the existence 

 of microscopic eggs in the urine. The same results from 

 another worm — Eustrongylus Oigas. But without the ob- 

 servation of such eggs weakness of the hind parts cannot 

 be ascribed to the hidney-worm. 



Treatment is unsatisfactory. Small doses of salt and oil 

 of turpentine may be given with no great hope of success. 

 The favorite dose of arsenic only escapes killing the hog 

 because he rejects it all by vomiting. If beneficial at all 

 it must be in smaU doses, one-eighth to one-sixth grain, so 

 that it may be taken up into the system. 



Prevention is to be sought by keeping the healthy and 

 diseased apart, and especially by raising young pigs apart 

 from the ground occupied by the old. 



TEICHINA SPIRALIS. 



This worm, which is capable of being reared in all the 

 domestic animals, is especially common in man, the hog 



Fig. 9— Adult Intestinal Trichina Spiralis, magnified. 



and the rat. Trichinae are almost microscopic, vary- 



