PREVENTION, SYMPTOMS AND TREATMENT IO ,i 



In Poultry. — Ascarides are common in hens, pigeons and 

 geese. 



Symptoms. — These are chiefly diarrhea, weakness, ruffled plu- 

 mage, apathy and huddling in a corner. Hens take about 45 grains 

 of areca nut in pills with butter; pigeons 15 grs., every third day. 



Genus. — Oxyuris, Whip> Thread or Pin Worm. 



In the Horse. — O. curvula, mastigodes and vivipara. Thread- 

 worms inhabit the large intestine and produce symptoms in the 

 course of their passage through the rectum and anus. Itching and 

 rubbing and the appearance of the worms about the anus, on 

 feces, or of their ova about the anus, call attention to the disorder. 



Treatment. — Rectal injections of a strong solution of common 

 salt in water; of quassia (1 ounce to 1 pint of cold water) ; or of 

 lime water; are commonly used, after the bowel has been well 

 washed out with a soap-suds enema, and the same treatment con- 

 tinued once daily for a considerable period. But in addition it is 

 well to give the same internal treatment as for the ascaris or larger 

 round-worm noted above. 



In the Dog, the O. vermicularis is the same species of thread 

 worm as infests the human and for this reason there is danger of 

 communication of the ova, especially in the case of children. The 

 discharged parasites should always be destroyed. Itching about the 

 anus may be relieved by 10 per cent, orthoform ointment. 



The treatment is the same as in the horse. 



Strongylidae. — Family. — Genus. — Strongylus. 



In the Horse. — S. armatus and tetracanthus. The mature 

 S. armatus inhabits the large intestine and, the ova escaping, may 

 be retaken by the horse in drinking water and the larvae may enter 

 the blood vessels, causing thrombosis in various organs (see Colic, 

 p. 58). S. tetracanthus remains encysted in the mucosa of the 

 large intestine. Symptoms of dysentery and colic are the main 

 ones, and the parasites may be found in the discharges and on the 

 arm after rectal examination. 



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