CHAPTER XXII. 

 PARASITIC DISEASES OF THE HORSE. 



-IV. MANGE. V. RING- 



L INTESTINAL "WORMS. II. BOTS. III. LIC 



WORM. 



I. Intestinal Worms. 



Three kinds of tape-worms and seven of round worms have been found 

 in the intestines of the hoi^se. The tape-worms are very rare, and hence 

 have but Httle interest for the average reader. But the round worms are 

 both very common and highly injurious to the animal harboring them. 



Pin-tuorms or ascarides. — The most noteworthy is the pin-worm, of 

 which two kinds are very common, viz.: Sclerostomum, Equinum and 

 Oxyuris curvola. These, which are usually spoken of as ascarides, are 

 small round worms about an inch and a half to two inches long, pointed 



llOK-SK IX _LAST yT.\Oi: OF INPECTIOUtf ANEMIA. 

 (A Deficiency of Blood in the System.; 



at both ends, with a small black head. They inhabit the large intestines 

 (the rectum usually, and sometimes the colon), where they often exist 

 in large numbers, some of them being passed, also, from tim^e to time, in 

 the dung. 



Teres Lumbnci. — The next most common worm is the large round 

 worm scientifically known as teres Iv/mhrid, which are about as thick as a 

 clay pipe-stem, and, as to length, about eight to twelve inches for the 

 male and about ten to eighteen inches for the female. They infest the 



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