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Oocyst |
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oocyst [′ō·ə‚sist]
(invertebrate zoology) The encysted zygote of some Sporozoa. Oocyst one of the stages in the development of protozoans of the class Sporozoa. The oocyst forms as a result of the encyst-ment of a fertilized egg cell. It is covered with a strong protective membrane. The contents of the oocyst generally divide into several nonmotile spores (in Coccidia) or motile sporozoites (in Gregarinidia). In Hemosporidia the oocyst produces thousands of sporozoites, which subsequently leave the oocyst. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | 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. Samples were examined for Cryptosporidium oocysts by using aniline-carbol-methyl violet staining and light microscopy at x 1,000 magnification (6). |
Oocyst |
OOCB OOCC OOCCL OOCCVB OOCD OOCDN OOCEA oocenter OOCH Oochoristica Oochoristica megatoma OOCI OOCL OOCMB OOCoD OOCP OOCR OOCS OOCSMP OoCT OOCTG OOCUR OOCWG oocyesis Oocyst oocyst patchesoocyst patches oocyst patches oocyst plaques oocyst plaques oocyst plaques Oocysts Oocysts Oocysts oocyte oocyte oocyte Oocyte Cysteine Protease Inhibitor Oocyte donation Oocyte donation Oocyte donation Oocyte donation Oocyte maturation Oocyte maturation Oocyte maturation Oocyte Maturation Inhibitor Oocyte with Germinal Vesicle Oocytes Oocytes Oocytes Oöcytes Oöcytes Oöcytes oocytin Oocytogenesis | |||||||
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