920 



DISEASES OF SHEEP. 



Fig. 1218.- 



-Tape-worm of Sheep, Scolex Greatly 

 Magnified. 



be affected with it, the dead 

 sheep of which were exam- 

 ined and " found packed full 

 of tape-worms." There is 

 no means of prevention of 

 this disease, as the eggs of 

 the tape-worm may be 

 dropped by rabbits, squir- 

 rels, skunks, and other wild 

 animals,_as well as by dogs. 

 Under the head of Turn- 

 sick we have^ given the pro- 

 cess of the development of 

 the hydatid in the brain of* 

 a sheep, from the larva 



dropped by, the dog. In Fig. 1219 is shown the first segment or 



scolex of the taenia, of tape-worm, inclosed in a membranous cyst. 



Van Beneden calls the parasite in this form the cysticercus tenuicollis. 

 We translate the following synopsis of the transformations of 



the tape-worm~from Hurtrel d'Arboval's Dictionnaire de Medicine, 



de Chirurgie, et d' Hygibtte Veterinaires .\-r— 



" By .Virtue of the investigations of Siebald, Van Beneden, Kuchenmeister, and 

 other great scientists, we know to-day that the cysticercus celluloses, which constitutes 

 the measles in the hog, becomes, in its passage into the stomach of man, the tcenia 



soliwn, or the solitary worm ; the cysticer- 

 cus piriformis of the rabbit becomes in 

 the dog the taenia serrata; the cysticercus 

 longicollis of the field-mouse becomes the 

 tcenia crassiceps of the fox and of the 

 terrier dog ; the cysticercus fasciolaris of 

 the niouse becomes the tcenia crassicolis 

 in the cat ; the ccenurus cerebraMs of the 

 sheep becomes the tcenia ccenurus of the 

 dog ; the echmococcus becomes equally a 

 tcenia, and the tcenia an echinococcus ; the 

 encysted trichina becomes prolific only 

 when it penetrates into the alimentary 

 canal of other animals ; the strongyli pass 

 likewise a portion of their life in the con- 

 dition of non-sexual beings." 



The symptoms indicating tape- 

 worm in the intestines are great 

 appetite, alternating with refusal 

 of food ; desire to eat dirt, the 

 passage of soft dung mixed with 



Fig. 1219.— The Scolex or First Segment of 

 the Tape-worm, in its Hydatic Condition. 



