oocyst


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Related to oocyst: cryptosporidium

o·o·cyst

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

oocyst

(ˈəʊəˌsɪst)
n
(Zoology) an encysted zygote of sporozoan protozoans that undergoes sporogony to produce infective sporozoites

o•o•cyst

(ˈoʊ əˌsɪst)

n.
the encysted zygotic stage in the life cycle of some sporozoans.
[1870–75]
References in periodicals archive ?
A possible cause of finding oocysts in calves of 1 day of age has been referred to by Romero et al (4) involving the teats of the mother as a major source of infection by being contaminated with oocyst of Cryptosporidium spp.
parasite is at a hardy stage of its life cycle called an oocyst, a tiny bundle of a few cells.
5] reported 22% fecal oocyst positive rate out of 230 out patients of private hospital and Chai et al.
This study was designed to determine the effects of a high fat, high protein, or high fiber diet on oocyst production of E.
The oocysts are oval, 26,3-29,4 x 15,1-17,6, enclosed in a conspicuous border (envelope, limiting wall), the undifferentiated oocyst contents are vacuolated (foamy) and show a denser central mass (Figs.
After ingestion by a calf, a single oocyst (coccidial egg) can multiply to up to 24 million oocysts, which are then shed into the environment, posing a risk to all in-contact calves and future generations.
The infective stages are four naked sporozoites enclosed in a spherical, thick wall oocyst (measuring 4-6 [micro]m and lacking the sporocyst), which enables the parasite to survive for months outside the host (Fayer et al.
There were no significant differences in oocyst rate among An.
It has a complex life cycle; its infectious stage is the spherical oocyst.
Next, Vernick's team scanned the mosquitoes' DNA for markers that might correlate with a heavy oocyst presence.
In other cases, boil water advisories have been issued when oocyst numbers from watersheds reached levels of concern.