oocyst

The encysted form of the fertilized macrogamete, or zygote, in coccidian Sporozoea in which sporogonic multiplication occurs; results in the formation of sporozoites, infectious agents for the next stage of the sporozoan life cycle. [G. oon, egg, + kystis, bladder]

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oo·cyst 'ō-ə-.sist n ZYGOTE specif a sporozoan zygote undergoing sporogenous development

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n.
a spherical structure, 50-60 µm in diameter, that develops from the zygote (see ookinete) of the malarial parasite (Plasmodium) on the outer wall of the mosquito's stomach. The oocyst steadily grows in size and its contents divide repeatedly to form sporozoite, which are released into the body cavity of the mosquito when the oocyst bursts.

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oo·cyst (oґo-sist) [oo- + cyst] the encysted or encapsulated zygote in the life cycle of sporozoan protozoa, which by the process of sporogony develops into a sporozoite or a sporocyst containing sporozoites.

Medical dictionary. 2011.

Look at other dictionaries:

  • oocyst — n. a spherical structure, 50–60 μm in diameter, that develops from the zygote (see ookinete) of the malarial parasite (Plasmodium) on the outer wall of the mosquito s stomach. The oocyst steadily grows in size and its contents divide repeatedly… …   The new mediacal dictionary

  • Oocyst — An oocyst is the spore phase of certain protists, such as Cryptosporidium and Toxoplasma . This state can survive for lengthy periods outside a host and is very resistant.A thick walled structure in which sporozoan zygotes develop and that serves …   Wikipedia

  • oocyst — noun Etymology: International Scientific Vocabulary Date: 1875 zygote; specifically a sporozoan zygote undergoing sporogenous development …   New Collegiate Dictionary

  • oocyst — n. [Gr. oion, egg; kystis, pouch] The cystic form in the parasitic protozoans (Apicomplexa), resulting from sporogony; may be hard covered, with a resistant membrane (Eimera) or be naked (Plasmodium) …   Dictionary of invertebrate zoology

  • oocyst — (o o sist) Cyst formed around a zygote of malaria and related protozoa …   Dictionary of microbiology

  • oocyst — /oh euh sist /, n. Biol. the encysted zygotic stage in the life cycle of some sporozoans. [1870 75; OO + CYST] * * * …   Universalium

  • oocyst — noun A thick walled structure under a mosquitos outer gut lining, formed by an ookinete …   Wiktionary

  • oocyst — oo·cyst …   English syllables

  • oocyst — o•o•cyst [[t]ˈoʊ əˌsɪst[/t]] n. mcr the encysted zygotic stage in the life cycle of some sporozoans • Etymology: 1870–75 …   From formal English to slang

  • oocyst — ˈōəˌsist noun Etymology: International Scientific Vocabulary o + cyst : zygote; specifically : a sporozoan zygote undergoing sporogenous development …   Useful english dictionary

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