PARASITIC DISEASES 



921 



mucus, and evidences of internal pain. The most effective treat- 

 ment is believed to be the following preparation : — 



Linseed oil 2 oz; 



Spirits of turpentine J to 1 oz. 



Repeat twice a week 

 for two weeks. If 

 this is not effective, 

 three ounces of pow- 

 dered root of male 

 fern may be given 

 once a week, to be 

 followed by a purga- 

 tive of linseed oil in 

 six hours. See also 

 treatment given on 

 page 509, Part I., in 

 diseases of horses. 



Hair Worms. — The 

 intestines are some- 

 times infested by a 

 species of worm thus 

 called, causing diar- 

 rhea and emaciation. 

 A cough also accom- 

 panies the diarrhea. 

 Salt in doses of half 

 an ounce, given on 

 alternate days, with 

 one dram doses of 

 sulphate of iron, is a 

 pretty sure remedy 

 for these parasites. 

 The food should be 

 of the most nutritive 

 kind. 



PARASITIC D I S- Fig- 1220.— Organs of Circulation and Respiration in an Insect. 

 EASES OF THE SMUT. ^ abdominal portion of the dorsal vessel; B, aortic or 



THE MANGE The thoracic portion; C, air-vessels of the head; B, of the ab- 

 domen. . 

 most formidable and, 



annoying of the external parasites of the sheep is the scab insect, or , 



acarus scabiei, which causes the scab, itch, or mange. It dwells on 



