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・ Heterocithara
・ Heteroclinic bifurcation
・ Heteroclinic cycle
・ Heteroclinic network
・ Heteroclinic orbit
・ Heteroclinus
・ Heteroclinus adelaidae
・ Heteroclinus antinectes
・ Heteroclinus eckloniae
・ Heteroclinus equiradiatus
・ Heteroclinus fasciatus
・ Heteractis malu
・ Heteragrion
・ Heteragrion eboratum
・ Heteragrion tricellulare
Heterakis
・ Heterakis gallinarum
・ Heteralepadidae
・ Heteralepas
・ Heteralex
・ Heterallactis
・ Heterallactis aroa
・ Heterallactis euchrysa
・ Heterallactis microchrysa
・ Heterallactis niphocephala
・ Heterallactis phlogozona
・ Heterallactis semiconstricta
・ Heterallactis stenochrysa
・ Heterallactis trigonochrysa
・ Heteranassa


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Heterakis : ウィキペディア英語版
Heterakis

''Heterakis'' is a genus of parasitic nematodes. Members of the genus are minute roundworms (pinworms), hardly 1 cm long, infecting different species of gallinaceous birds, including chickens, turkeys, ducks, geese, grouse, guineafowl, partridges, pheasants, and quail. About 10 species are placed in the genus, but classification is often ambiguous due to their close resemblance, and a number of synonyms have arisen. ''H. gallinarum'' Schrank, 1788; ''H. isolonche'' von Linstow, 1906; and ''H. dispar'' Schrank, 1870 are the best understood species in terms of prevalence, pathogenicity, and biology. They inhabit the lumen of the cecum of the host.〔Permin A & Hansen JW (1998). (''The Epidemiology, Diagnosis and Control of Poultry Parasites'' ). Food and Agriculture Organization of the United Nations, Rome, Italy, pp. 29-30. ISBN 92-5-104215-2〕
The nematodes are whitish in colour, cylindrical, and with fine longitudinal striations throughout the body. The body covering is a proteinaceous layer named cuticle. The anterior end is the mouth with distinct lips, and the anus opens towards the posterior. They are diecious with marked sexual dimorphism. Males are shorter and smaller, with straight blunt tails, while females are bigger and longer, with curved tails. They all exhibit direct lifecycles. They cause nodular typhlitis, diarrhoea, emaciation, and death.〔Kaufmann, J (1996). (''Parasitic Infections of Domestic Animals: A Diagnostic Manual.'' ) Birkhäuser Verlag AG, Basel, Switzerland, p. 423. ISBN 3-7643-5115-2〕 ''H. gallinarum'' is the most well-known species, and is most important as it transmits the protozoan parasite, ''Histomonas meleagridis'' in birds.
== References ==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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