. Poultry diseases and their treatment. Poultry. POULTRY DISEASES AND THEIR TREATaiENT. 17 fertilized and mature the segment containing them drops off and passes to the exterior with the feces of the host. Each segment of this l<ind contains thousands of eggs. If these eggs are to develop far- ther they must be swallowed by some intermediate host (as a worm, snail or insect). The egg then hatches into a 6-hooked embryo which bores its way from the intestine into the body cavity of the intermediate host. It here develops into a larval form known as a cysficcrcoid. When the intermediate host
. Poultry diseases and their treatment. Poultry. POULTRY DISEASES AND THEIR TREATaiENT. 17 fertilized and mature the segment containing them drops off and passes to the exterior with the feces of the host. Each segment of this l<ind contains thousands of eggs. If these eggs are to develop far- ther they must be swallowed by some intermediate host (as a worm, snail or insect). The egg then hatches into a 6-hooked embryo which bores its way from the intestine into the body cavity of the intermediate host. It here develops into a larval form known as a cysficcrcoid. When the intermediate host (worm, snail, ;) is eaten by a chicken this larva con- tinues its development and forms an adult tape worm. Thus there are two stages in the life cycle of a tape worm: that in the adult host and that in the intermediate host. Each species of tape worm, of which there are a great many, has its par- ticular host, both intermediate and final. According to Stiles (Bur. An. Ind. Bui. 12) there were up to 1896, 33 species of tape worms recorded for poultry. Of these 11 are re- corded as occurring in chickens. The complete life history is known Regarding the tape worms of chick- p. 13: "(They) are knoimi to become infected with one tape worm through eating slugs (Limax). They are supposed to become infected with a second through eating snails (Helix) ; by a third through eating fhes and by a fourth through eating earth ; There seems but little need to give a description of the differ- ent species of tape worms found in chickens. The characters by which they are distinguished from each other are too minute and involved to be of use to the poultryman or farmer. If any- one is having trouble with tape worms in poultry the best thing'. Fig. 6. Drepanidotaciiia in fundibulifonnis. a tape worm of the fowl. (Af- ter Stiles). for only a few of these, ens, Stiles {loc. cit.) Please note that these images are extracted from scanned page images that may have been
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Keywords: ., bookauthorpe, bookcentury1900, bookdecade1910, booksubjectpoultry
