opisthomastigote

opisthomastigote
Term now used instead of herpetomonad for the stage of development of certain insect- and plant-parasitizing flagellates to avoid confusion between the stage and the genus Herpetomonas. In this stage the flagellum arises from the kinetoplast located behind the nucleus and emerges from the anterior end of the organism; an undulating membrane is absent. [opistho- + G. mastix, whip]

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opis·tho·mas·ti·gote (o″pis-tho-masґtĭ-gōt) [opistho- + Gr. mastix whip] a morphologic stage in the life cycle of certain trypanosomatid protozoa in which the kinetoplast and basal body are posterior to the nucleus, the flagellum runs through the body of the cell to emerge anteriorly as a free-flowing structure, and an undulating membrane is absent. Cf. amastigote, choanomastigote, epimastigote, promastigote, and trypomastigote.

Medical dictionary. 2011.

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  • opisthomastigote — noun A stage in unicellular life cycle, typically trypanosomes, where the flagellum is posterior of the nucleus, and passes through a groove in the cell body …   Wiktionary

  • amastigote — SYN: Leishman Donovan body. [G. a priv. + mastix, whip] * * * amas·ti·gote (ə masґtĭ gōt) [a 1 + Gr. mastix whip] a morphologic stage in the life cycle of some kinetoplastid protozoa; the oval or round cell has a nucleus,… …   Medical dictionary

  • choanomastigote — A term, in the series used to describe developmental stages of the parasitic flagellates, denoting the “barleycorn” form of the flagellate in the genus Crithidia characterized by a collarlike extension surrounding the anterior and through which… …   Medical dictionary

  • epimastigote — Term replacing “crithidial stage,” to avoid confusion with the insect parasitizing flagellates of the genus Crithidia. In the e. stage the flagellum arises from the kinetoplast alongside the nucleus and emerges from the anterior end of the… …   Medical dictionary

  • promastigote — Term now generally used instead of “leptomonad” or “leptomonad stage,” to avoid confusion with the flagellate genus Leptomonas. It denotes the flagellate stage of a trypanosomatid protozoan in which the flagellum arises from a kinetoplast in …   Medical dictionary

  • Trypanosomatidae — A protozoan family of hemoflagellates (order Kinetoplastida, class Zoomastigophorea, subphylum Mastigophora); asexual blood and/or tissue parasites of leeches, insects, and vertebrates and sap inhabitants of plants, characterized by a rounded or… …   Medical dictionary

  • trypomastigote — Term to replace the older term, “trypanosome stage,” which was often confused with the flagellate genus Trypanosoma. It denotes the stage (infective stage for South American trypanosomiasis and African trypanosomiasis, and the only stage found in …   Medical dictionary

  • Trypanosomatina — Try·pano·so·ma·ti·na (tri pan″o so″mə tiґnə) a suborder of parasitic protozoa of the order Kinetoplastida, phylum Euglenozoa, comprising hemoflagellates that are found in the hosts blood, lymph, and tissues. They have a… …   Medical dictionary

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