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Echinococcus granulosus — The hydatid tape- worm. According 

 to Styles, there are 110 synonyms. Often known as Taenia echino- 

 coccus. Adult in dog, .20 inch or less in length. 3 segments and head. 

 Larva in a great variety of hosts, man, cattle, sheep, hogs, et al. 



Life history — Cystic stage may attain size of an orange, or even 

 of a child's head. Within this cyst there develop by budding a great 

 number of broad capsules, each containing from 1-120 heads capable 

 of developing into tapeworms. For detailed account of life history, 

 see Leuchart, '86. 



Multiceps coenurus — {Taenia coenurus, Coenur'us cerebralis). 

 The tapeworm whose larva in the brain or spinal cord of sheep 

 produces the fatal disease known as "gid". Adult in small intestine 

 of dog, eggs scattered with feces over herbage and taken up by sheep. 

 Embryos migrating to brain develop into cysts which may reach 

 size of a hen's egg. On the interior of these cysts are to be found 

 many invaginated heads of the future worm. May be as high as 

 500 to a cyst. 



Prophylaxis — Burn infested heads of sheep to prevent infection 

 of dogs; by direct treatment keep dogs free from the tapeworms, 

 and avoid possible contamination of pastures. The parasite has not 

 yet gotten established in this country and law requires quarantine 

 and examination of feces of all imported collies. (See Ransom, '05). 



