oocyst

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oocyst

 [o´o-sist]
the encysted or encapsulated ookinete in the wall of a mosquito's stomach; also, the analogous stage in the development of any sporozoon.

o·o·cyst

(ō'ō-sist),
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. ōon, egg, + kystis, bladder]

oocyst

/oo·cyst/ (-sist) the encysted or encapsulated ookinete in the wall of a mosquito's stomach; also, the analogous stage in the development of any sporozoan.

oocyst

(ō′ə-sĭst′)
n.
A thick-walled structure that contains the zygote of an apicomplexan parasite and releases the infective sporozoites.

oocyst

[ō′əsist]
Etymology: Gk, oon + kystis, bag
a stage in the development of sporozoa consisting of a zygote enclosed by cyst wall. Oocysts of malarial parasites are found in the stomachs of infected mosquitoes. Oocysts of toxoplasma organisms are contained in the feces of infected cats. Compare oocyte.

oocyst

Public health The infectious stage of coccidian sporozoites–eg, Cryptosporidium parvum and others, which has a protective wall that facilitates survival in water and other environments

o·o·cyst

(ō'ŏ-sist)
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. ōon, egg, + kystis, bladder]

oocyst

A structure that develops on the outer wall of the mosquito's stomach from the fertilized malarial parasite. The parasite divides repeatedly within the oocyst which rapidly fills up with the infective form of the parasite (SPOROZOITES) until it bursts, releasing the sporozoites into the body cavity of the mosquito to be passed on to humans.

oocyst

the cyst which contains the conjugating gametes in SPOROZOANS.

Oocyst

The egg form of the toxoplasmosis organism.
Mentioned in: Toxoplasmosis

oocyst

the resistant stage of the life cycle of coccidial parasites. It contains a zygote and under appropriate conditions sporulates to become a mature infective oocyst. It may also remain infective for long periods in dry conditions.

oocyst patches
see oocyst plaques.
oocyst plaques
raised patches up to 0.5 inch diameter in small intestinal epithelium in goats and sheep caused by heavy infestation by coccidial oocysts.
References in periodicals archive ?
We propose that vapor nanobubbles can be generated around residual hemozoin in developing oocysts or similar dense forms of heme formed by the malaria parasites at this stage (32,33).
Does that are infected at kidding may contaminate the area with oocysts that are released due to stress of kidding.
Cryptosporidium species have direct life cycles, with oocysts shed in the feces or expelled from the respiratory tract by infected hosts.
Once a single coccidial oocyst is ingested by a lamb, it will multiply internally and around 16 million will be excreted back into the environment.
Collaborating with researchers at the nonprofit Southwest Research Institute (SwRI) in San Antonio, Texas, they have developed an effective vaccine delivery system by putting low doses of live Eimeria oocysts inside gelatin beads that chickens readily gobble up.
oocysts are required to infect a child, for obvious reasons, a study that was conducted with pigs found that a single oocyst was sufi[logical not]cient to cause infection in 13 of 14 experimentally infected pigs," the authors wrote.
November 14, 2010, was also the day when the UV light system, which would have inactivated Cryptosporidium oocysts, was shut down for most of the day.
Though infectious oocysts can't push through unbroken human skin, parasitologists advise people to wear gloves and wash their hands thoroughly when cleaning litter boxes.
All warm-blooded animals can get infected through ingestion of these oocysts.
apicomplexa), parasite of the mussel Mytella guyanensis (Mytilidae) from the Amazon Estuary and description of its oocysts.
1% excreted coccidia oocysts and the most commonly recorded species were E.