oocyst


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Related to oocyst: cryptosporidium

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 ?
Fecal smears were prepared from each sample by the formalin-ether concentration technique, stained by modified acid-fast procedure, and then examined for oocysts of C.
1] is the total oocyst count on the left side of the counting chamber, [C.
Meronts as well as oocysts develop apparently in capillary endothelial cells or in macrophages of the liver, spleen and kidneys.
Survival of Cryptosporidium parvum oocyst recovered from experimentally contaminated oyster (Ostrea edulis) and clams (Tapes decussates).
The presence of both oocysts and sporozoites stages confirms that An.
In the absence of control, the proliferation of the infectious oocysts in recycled water is increased.
However, turning off APL1 increased the number of oocysts in the insects about 10-fold, the scientists report in the April 28 Science.
Oocyst populations isolated from water are often of mixed genotype (Jiang et al.
However, no studies have been conducted in Sri Lanka on the prevalence of Giardia cysts and Cryptosporidium oocysts in surface-water or deep wells.
Detection of Toxoplasma gondii-like oocysts in cat faeces and estimates of the environmental oocyst burden.