Toxoplasma


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Toxoplasma

 [tok″so-plaz´mah]
a genus of sporozoans that are parasites of humans, other mammals, and some birds; it includes one species, T. gon´dii, that can be transmitted from an infected mother to an infant in utero or at birth. See also toxoplasmosis.

Toxoplasma

/Toxo·plas·ma/ (tok″so-plaz´mah) a genus of sporozoa that are intracellular parasites of many organs and tissues of birds and mammals, including humans. T. gon´dii is the etiologic agent of toxoplasmosis.

toxoplasma

(tŏk′sə-plăz′mə)
n.
Any of various parasitic protozoans of the genus Toxoplasma, including some that cause disease in birds and mammals.

Toxoplasma

[tok′sōplaz′mə]
Etymology: Gk, toxikon + plasma, something formed
a genus of protozoa with only one known species, T. gondii, an intracellular parasite of cats and other hosts that causes toxoplasmosis in humans.

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 ?
Jones JL, Kruszon-Moran D, Rivera H, Price C, Wilkins PP Toxoplasma gondii Seroprevalence in the United States 2009-2010 and comparison with the past two decades.
Written for parasitologists, cell and molecular biologists, veterinarians, neuroscientists, physicians, and food scientists, this volume details the biology, ultrastructure, genetics, immunology, and animal models of the parasite Toxoplasma gondii.
Unlike pyogenic abscesses, the core tissue of rim-enhancing toxoplasma abscesses shows no restriction of water diffusion, and the signal intensity of the abscess core on diffusion-weighted MRI is equal to or less than that of normal, unaffected cerebral white matter.
His research project was titled "Development of toxoplasma multi-protein sub-unit vaccine and their experiment trials in mouse model administered intranasally with triad of antigens formulated in nanoparticles," Prof Pasha said.
They may contain a parasite called toxoplasma, which can seriously harm an unborn baby.
Data from last year's Barren EweCheck scheme, run by MSD Animal Health, showed that 83% of the flocks tested had been exposed to the toxoplasma parasite.
I've just read that the toxoplasma parasite spread by cats is infecting 1,000 people a day in Britain.
Scientists have identified which strains of the Toxoplasma gondii parasite, the cause of toxoplasmosis, are most strongly associated with premature births and severe birth defects in the United States.
The kinetoplast, seen in the parasite in Figure 1B, distinguishes Trypanosoma cruzi from both Toxoplasma and Histoplasma, which lack a kinetoplast, but not from Leishmania, which does have this structure but usually concentrates in the phagocytic cells, an uncommon site for Trypanosoma cruzi Leishmania is transmitted by the sand fly; Chagas disease is transmitted by adult reduviid bugs that ingest trypomastigotes while taking blood meals from infected animals, and are then ingested or contaminate mucus membranes, conjunctiva, or abraded skin with fecal material.
We present a case of severe toxoplasma encephalitis in an immunocompetent individual diagnosed by brain biopsy, and discuss the lesion patterns on conventional and diffusion MRI.