DISEASES OF SHEEP. 



317 



or whatever internal organ the cyst may have lodged in. If this 

 occurs the remains of the parasite will be marked by a limy deposit 

 at the spot where it perished. But there exists this danger. If 

 the embryos become encysted in the muscles of any animal whose 

 flesh is used as food, and the embryos are still living, those per- 

 sons who may eat the meat of such animals, and which has not 

 been sufficiently cooked, will become infected; as is so frequently 

 the case among persons who consume their food half cooked, 

 or not cooked at all. This does actually occur to an enormous 

 extent among half civilized peoples. Dry mutton hams may thus 

 infect persons who eat them. In this cystic form the parasite is 

 known as Cysticercus terini-collis, or the slender-necked, round 

 cysted worm. 



If the worm is to be attacked at all it should be in the dog. 

 This is an easy method, for by administering the proper antidote 

 at regular intervals of two months, the worms may be destroyed 

 and the sheep delivered from the danger so far. As another tape 

 worm of the sheep inhabits the dog and its term is nearly a month, 

 the safe way would be to give the medicine every twenty days, 

 thus covering the intervals of each of these parasites. Areca 

 nut is the most effective remedy for this use. The freshly ground 

 powder, in quantity equal to two grains for each pound of live 

 weight of the dog, may be given with butter or in any other 

 convenient and simple way. The dog should go unfed from noon 

 the previous day and until a few hours after the medicine is 

 given. Two hours after giving the medicine, give one ounce of 

 caster oil. Keep the dog tied up until the medicine has operated, 

 and the dead worms have been passed. Any other effective sub- 

 stitute may be used if the desired effect is gained. 



TENIA COENURUS. GID OR STAGGERS IN SHEEP. 



This species of tape worm is the cause of that well known 

 and frequent disease of sheep called Gid, Turnsick or Staggers. 



FIG. 3. Adult, Natural Size. 



It is so named because the animal under the influence of the 

 disease becomes giddy and is compelled by a well known function 

 of the brain, to turn to this or the other side, as it moves,impelled 

 thereto by the influence of the pressure on either half of the brain 

 as the case may be. It is well known that each half of the brain 

 exercises its function on that special side of the animal, and thus 

 the pressure of the watery bladders, in which the embryos of this 



