. Diseases of domesticated birds. Poultry; Poultry; Birds. INTERNAL PARASITES 183 variable segments designated. Fig. 24. Segment of Davainea echino- bothrida showing the reproductive or- gans. Enlarged. (Ransom) number of proglottides. The scolex is armed with a series of hooks by which it becomes at- tached to the intestinal mucosa of the host. Each proglottid or segment of the worm is virtually an individual and is bisexual. The segments are not provided with an alimentary canal, but absorb nourishment directly from the intestinal contents of the host. As the terminal segments in turn mature
. Diseases of domesticated birds. Poultry; Poultry; Birds. INTERNAL PARASITES 183 variable segments designated. Fig. 24. Segment of Davainea echino- bothrida showing the reproductive or- gans. Enlarged. (Ransom) number of proglottides. The scolex is armed with a series of hooks by which it becomes at- tached to the intestinal mucosa of the host. Each proglottid or segment of the worm is virtually an individual and is bisexual. The segments are not provided with an alimentary canal, but absorb nourishment directly from the intestinal contents of the host. As the terminal segments in turn mature, they are separated from the worm and are discharged in the droppings. Species of cestodes. A large number of species of tapeworms have been reported as occurring in the intestines of domesticated and wild birds. Kansom has examined nine species in American chickens and turkeys as follows: In chickens, Hymenolepis carioca, Choanotaenia infundihulum, Davainea tetragona, D. echinoboihrida, D. proglottina, Amoehotaenia sphenoides; in chickens and turkeys, D. cesticillus, Hymenolepis cantaniana; in turkeys, Metroliasthes lucida. He notes that the tapeworms of American ducks, geese, and pigeons have not yet been investigated. Neumann lists four more species as having been found in fowls. These are Cotugnia diagono- pora. Taenia fasciolaris, T. exilis and Bothriotaenia longicollis. Tapeworms found in the various birds are listed by Neumann as follows: Turkey: Choanotaenia infundihulum, Metroliasthes lucida, Davainea cantaniana, D. cesticillus, D. friedbergeri, Hymenolepis carioca, H. musculosa, H. meleagris. Not named. Pheasant: Choanotaenia infundihulum, Davainea echinohoth- rida, D. cantaniana, D. friedhergeri, Hymenolepis phasianina. Pigeon: Choanotaenia infundihulum, Davainea echinohothrida, D. crasmla, Bertiella delafondi. Duck: Hymenolepis anatina, H. gracilis, H. sinuosa, H. coronula, H. parvula, H. megalops, H. lanceolata, Choanotaenia infmidibulum, Davainea crassula, Flmhri
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