Toxoplasma gondii


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Tox·o·plas·ma gon·di·i

(tok'sō-plaz'mă gon'dē-ī),
An abundant, widespread sporozoan species (family Toxoplasmatidae) that is an intracellular, non-host-specific parasite in a great variety of vertebrates. It develops its sexual cycle, leading to oocyst production, exclusively in cats and other felids; proliferative stages (tachyzoites) and tissue cysts (containing bradyzoites) develop in a wide variety of animal species that acquire the infection from ingestion of oocysts, tissue cysts from infected meat, organ transplantation or by transplacental migration, leading to infection in utero.
[G. toxon, bow or arc, + plasma, anything formed]

Toxoplasma gondii

A species of obligate intracellular coccidian protozoans which has its sexual cycle in the GI tract of its definitive host, Felis catus. Infection—formally, toxoplasmosis—results from ingestion of oocytes shed in cat faeces or, very rarely, ingestion of meat contaminated by pseudocysts.

Toxoplasma gondii

Parasitology A species of obligate intracellular coccidian protozoans that has its sexual cycle in the GI tract of its definitive host, Felis catus; infection–toxoplasmosis–is usually the result of ingestion of oocytes shed in cat feces or, very rarely, due to ingestion of meat contaminated by pseudocysts. See Toxoplasmosis.

Tox·o·plas·ma gon·di·i

(tok'sō-plaz'mă gon'dē-ī)
An abundant, widespread sporozoan species that is an intracellular, non-host-specific parasite in a great variety of vertebrates. It develops its sexual cycle, leading to oocyst production, exclusively in cats and other felids; proliferative stages (tachyzoites) and tissue cysts (containing bradyzoites) develop in a wide variety of animal species.
[G. toxon, bow or arc, + plasma, anything formed]

Tox·o·plas·ma gon·di·i

(toksō-plazmă gondē-ī)
Abundant, widespread sporozoan species that may cause in utero infection.
[G. toxon, bow or arc, + plasma, anything formed]

Toxoplasma

a genus of apicomplexan parasites in the family Sarcocystidae.

Toxoplasma gondii
a coccidian parasite of the intestine of all felids, including especially the domestic cat, jaguarundi, ocelot, mountain lion, leopard cat, and bobcat, which are definitive hosts. Most vertebrates, including humans and birds, can be infected with the intermediate stages and experience one or other forms of the disease toxoplasmosis. Oocysts are the infective stage of importance in farm animals, and the only environmental infective stage for herbivores. Oocysts excreted in the feces of cats can survive in soil for many months and are ingested by the intermediate (livestock) host, and the parasite invades tissues to produce tissue cysts. The invasion can include the fetus. Tissue cysts in the intermediate host cause damage to the nervous system, myocardium, lung tissue, and placenta. Bradyzoites in animal tissues are a source for toxoplasmosis in humans and pigs.
Toxoplasma hammondi
see hammondiahammondi.
References in periodicals archive ?
11 /PRNewswire/ -- Recent news reports regarding a new recommendation that all pregnant women be screened for an infection caused by Toxoplasma gondii, also known as toxo, incorrectly suggest that undercooked eggs are a source of this parasite.
About 10-20 percent of people in the United States have Toxoplasma gondii, or T.
Toxoplasma gondii strains, virulent in mice, were isolated in some cases.
The test assists in the diagnosis of infection with the protozoan, Toxoplasma gondii, which can cause a range of birth defects in newborns.
Dubey is an Agricultural Research Service parasitologist and expert on Toxoplasma gondii, a parasite that infects animals and humans worldwide.
Now, a leading toxoplasmosis investigator reports data showing that another, long-unrecognized protozoan -- able to parasitize many of the same hosts--has for decades masqueraded as a particularly virulent form of the more familiar Toxoplasma gondii.
The study was conducted in mice infected with the parasite Toxoplasma gondii.
The Copalis ToRC total antibody assay is the first technology on the market which permits simultaneous detection of total antibodies (IgG and IgM) to Toxoplasma gondii, rubella and/or CMV in human serum.
Toxoplasma gondii is a widespread parasite infecting, among others, about 35 percent of the U.
1, plays a similar role in the secretion of microneme organelles that are crucial to the mobility of the parasitic protozoa Toxoplasma gondii, which causes toxoplasmosis, and Plasmodium falciparum, which causes malaria.
caninum might be zoonotic because of its close biologic relationship to the common zoonotic parasite Toxoplasma gondii and because rhesus monkeys have been experimentally infected (2).
Although it has been known that leishmania and other organisms, such as Toxoplasma gondii, have learned how to enter a macrophage without triggering a burst, Edelson believes this is the first time scientists have shown how leishmania achieve that feat.