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Topic: Toxoplasma gondii


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In the News (Sat 6 Sep 08)

  
  Toxoplasma gondii - Wikipedia, the free encyclopedia
Toxoplasma is a species of parasitic protozoa whose definitive host is cats but which can be carried by the vast majority of warm-blooded animals, including humans.
gondii propagates by a series of binary fissions until the infected cell eventually bursts and tachyzoites are released.
Toxoplasma infection causes damage to astrocytes in the brain, and such damage is also seen in schizophrenia.
en.wikipedia.org /wiki/Toxoplasma_gondii   (1064 words)

  
 Toxoplasmosis - Wikipedia, the free encyclopedia
Toxoplasmosis is a parasitic disease caused by the protozoan Toxoplasma gondii.
Toxoplasma is one of a number of parasites that may alter their host's behaviour as a part of their life cycle.
Although some researchers have found potentially important associations with toxoplasma, it is possible that these associations merely reflect factors that predispose certain types of people to infection (e.g., people who exhibit risk-taking behaviors may be more likely to take the risk of eating undercooked meat).
en.wikipedia.org /wiki/Toxoplasmosis   (1926 words)

  
 Medmicro Chapter 84
Toxoplasma gondii is an intestinal coccidium that parasitizes members of the cat family as definitive hosts and has a wide range of intermediate hosts.
Toxoplasma gondii is transmitted by three known modes: congenitally, through the consumption of uncooked infected meat, and via fecal matter.
Toxoplasma gondii may spread both locally to mesenteric lymph nodes and to distant organs by invading the lymphatics and blood.
gsbs.utmb.edu /microbook/ch084.htm   (3218 words)

  
 AASV News archive - Toxoplasma gondii infection in outdoor pig rearing systems
Toxoplasma gondii is an infectious parasite found in tissues of warm-blooded animals and is a major health concern to humans due to the potential transfer of the parasite from pregnant woman to their fetus.
In pigs, Toxoplasma infection occurs by the inadvertent ingestion of oocysts which are present in a variety of sources including soil, water, rodents, wildlife, and infected cat feces.
Toxoplasma antibodies were not detected in sera from slaughter pigs raised in conventional, indoor operations (n = 660).
www.aasv.org /news/story.php?id=1293   (376 words)

  
 CDC - Toxoplasma gondii and Schizophrenia
gondii antibodies in persons with schizophrenia and other severe psychiatric disorders and in controls have been reported; 18 reported a higher percentage of antibodies in the affected persons; in 11 studies the difference was statistically significant.
gondii is an intracellular parasite in the phylum Apicomplexa.
Herpesviruses and Toxoplasma gondii in orbital frontal cortex of psychiatric patients.
www.cdc.gov /ncidod/eid/vol9no11/03-0143.htm   (3291 words)

  
 Toxoplasma gondii and schizophrenia - Synopses Emerging Infectious Diseases - Find Articles
Since 1953, a total of 19 studies of T. gondii antibodies in persons with schizophrenia and other severe psychiatric disorders and in controls have been reported; 18 reported a higher percentage of antibodies in the affected persons; in 11 studies the difference was statistically significant.
Individual response to Toxoplasma infection is determined by immune status, timing of infection, and the genetic composition of the host and the organism (4).
Toxoplasma organisms have also been shown to impair learning and memory in mice (5) and to produce behavioral changes in both mice and rats.
www.findarticles.com /p/articles/mi_m0GVK/is_11_9/ai_111112351   (833 words)

  
 Toxoplasma gondii - HealthGene, Toxoplasma gondii DNA Testing
Toxoplasma gondii is an intracellular coccidian parasite and is one of the most common parasitic diseases of animals and man. The definitive hosts for the parasite (the only animals in which the organism reproduces sexually) are members of the Felidae family (mainly domestic cats).
gondii is of primary importance since the range of intermediate hosts which can become infected encompasses virtually all warm-blooded animals.
Toxoplasma gondii is also reported from most bird species but is more common in birds that eat meat or have access to the ground or insects that can mechanically transfer the oocysts.
www.healthgene.com /avian/a112.asp   (611 words)

  
 Toxoplasma Gondii >> Center of Biomedical Research Excellence   (Site not responding. Last check: 2007-07-20)
The obligate intracellular infectious agent Toxoplasma gondii is a member of the phylum Apicomplexa, which includes the organisms responsible for malaria and coccidiosis.
Although most Toxoplasma infections are asymptomatic, they can lead to severe disease and even death in utero and in individuals immunocompromised by AIDS or cancer.
Some of the devastating effects of a Toxoplasma infection are a direct consequence of its lytic cycle, which consists of attachment to the host cell, invasion, intracellular replication and egress.
www.ag.uidaho.edu /cobre/Toxoplasma_gondii_main.asp   (331 words)

  
 Medical Dictionary: Toxoplasma gondii - WrongDiagnosis.com
Toxoplasma gondii : member of the Apicomplexa, is the sole species of Toxoplasma; members of the cat family (Felidae) are the definitive hosts; many mammals and birds serve as intermediate hosts; infection is contracted by ingesting either oocysts or meat containing live organisms.
Toxoplasma gondii: Toxoplasma gondii is listed as a type of (or associated with) the following medical conditions in our database: Parasitic Conditions, Zoonotic Diseases, Protozoan Conditions, Diseases contagious from food, Diseases contagious contagious mother-to-fetus, Diseases contagious from cats, Diseases contagious from animals
Toxoplasma gondii: Toxoplasmosis is an infection caused by a single-celled parasite named Toxoplasma gondii.
www.wrongdiagnosis.com /medical/toxoplasma_gondii.htm   (301 words)

  
 The Analyst - Internet Health Report: Condition: Toxoplasmosis (Toxoplasma gondii)
It is believed that more than 60 million people in the United States probably carry the Toxoplasma parasite, but very few have symptoms because their immune system usually keeps the parasite from causing illness.
This results from an acute Toxoplasma infection or an infection that occurred earlier in life that reactivates and causes damage to the brain, eyes, or other organs.
Cats spread Toxoplasma in their feces for only a few weeks of their lives, usually after they are first infected with the parasite.
www.digitalnaturopath.com /cond/C669441.html   (1528 words)

  
 Toxoplasma gondii definition - Medical Dictionary definitions of popular medical terms
Toxoplasma gondii: A single-celled parasite that causes toxoplasmosis (toxo).
Toxoplasma gondii is very common (more than 60 million people in the US carry it) but few are aware of it because the immune system often keeps the parasite from causing illness.
Toxoplasma gondii is a well-known teratogen -- an agent that can cause birth defects.
www.medterms.com /script/main/art.asp?articlekey=14110   (326 words)

  
 eMedicine - Toxoplasmosis : Article by Murat Hökelek, MD, PhD
Background: Toxoplasma gondii is an obligate intracellular parasite that produces a wide range of clinical syndromes in humans, land and sea mammals, and various bird species.
The ability of T gondii to actively penetrate host cells results in formation of a vacuole that is derived from the plasma membrane, which is entirely distinct from a normal phagocytic or endocytic compartment.
Isolation of T gondii from amniotic fluid is diagnostic of congenital infection by mouse inoculation.
www.emedicine.com /med/topic2294.htm   (5945 words)

  
 Gene Expression: Toxoplasma gondii & human culture   (Site not responding. Last check: 2007-07-20)
Toxoplasma gondii, explains a statistically significant portion of the variance in aggregate neuroticism among populations, as well as in the 'neurotic' cultural dimensions of sex roles and uncertainty avoidance.
gondii hypothetically results from a behavioural manipulation that the parasite uses to increase its transmission to the next host in the life cycle: a cat.
gondii's affect on the sexes is inverted except for the trait of guilt, so it might be a wash if sexes are not separated in the analysis.
www.gnxp.com /blog/2006/08/toxoplasma-gondii-human-culture.php   (686 words)

  
 Utility of Tissue Culture for Detection of Toxoplasma gondii in Vitreous Humor of Patients Diagnosed with Toxoplasmic ...   (Site not responding. Last check: 2007-07-20)
Detection of Toxoplasma gondii in aqueous humor by the polymerase chain reaction.
Detection of Toxoplasma gondii by PCR and tissue culture in cerebrospinal fluid and blood of human immunodeficiency virus-seropositive patients.
Toxoplasma gondii reactivation identified by detection of parasitemia in tissue culture.
jcm.asm.org /cgi/content/full/38/10/3840   (1493 words)

  
 [No title]
Toxoplasma gondii is an intestinal coccidian of felids with an unusually wide range of intermediate hosts (including humans).
gondii infection and amount of personality factor shift (measured as differences in personality factors between Toxoplasma-infected subjects and uninfected controls of the same age) in two different sets of women (230 acute toxoplasmosis patients and 55 young mothers diagnosed with latent toxoplasmosis during pregnancy).
It is indicative that after the elimination of effect of the factor A on remaining factors (by computing standard residuals of linear regression between age-residuals of factors B...Q4 and the age-residual of factor A) the significant correlations between antibody level and the shift of the factors H and L in the young mothers virtually disappear.
www.natur.cuni.cz /~flegr/toxo97.htm   (3863 words)

  
 CarlZimmer.com   (Site not responding. Last check: 2007-07-20)
The relatively innocuous Toxoplasma is an unlikely candidate for a mind bender.
Toxoplasma elicits a strong immune response, which prompts the parasite to form tough-coated cysts in which it finds refuge until its host happens to be eaten by a cat.
The mildness of Toxoplasma's effects on its intermediate host make good evolutionary sense: It's not in the parasite's interest to be lethal, as cats find dead animals distasteful.
www.carlzimmer.com /articles/2000/articles_2000_1.html   (1013 words)

  
 [No title]
SUMMARY AND EXPLANATION OF THE TEST Toxoplasmosis is caused by the intracellular parasite Toxoplasma gondii and may be contracted by consuming contaminated meat or by contact with cat feces containing oocysts.
PRINCIPLE OF THE TEST Purified Toxoplasma gondii antigen is coated on the surface of microwells.
Toxoplasma antibody are present in apparently normal subjects in certain populations or geographic groups.
www.rapidtest.com /ToxoG_1101.doc   (1199 words)

  
 Toxoplasma gondii Encephalitis
Toxoplasmic encephalitis (TE) is caused by the protozoan Toxoplasma gondii.
gondii infection among patients with AIDS is a focal encephalitis with headache, confusion, or motor weakness and fever (1,2,3).
Polymerase chain reaction for Toxoplasma gondii DNA in the cerebrospinal fluid of AIDS patients with focal brain lesions.
hivinsite.ucsf.edu /hiv?page=md-agl-toxo   (2909 words)

  
 Project Inform: Toxoplasmosis [ HIV / AIDS Treatment Information ]
Toxoplasmosis is a disease caused by the organism Toxoplasma gondii.
Toxoplasma encephalitis can occur in patients who have antibodies to Toxoplasma gondii—which indicates that the infection is present in the body—and have T-cell counts below 100.
For people who do not have antibodies to Toxoplasma gondii or do have antibodies but no longer have the infection (determined using PCR), the best way to prevent toxoplasmosis is to prevent coming into contact with Toxoplasma gondii.
www.projinf.org /fs/toxo.html   (966 words)

  
 Toxoplasma gondii adenosine kinase
Adenosine kinase (AK) is a key purine metabolic enzyme from the opportunistic parasitic protozoan Toxoplasma gondii and belongs to the family of carbohydrate kinases that includes ribokinase.
Adenosine kinase from Toxoplasma gondii is a monomeric protein just as is human adenosine kinase.
Crystal structure of Toxoplasma gondii adenosine kinase in complex with an ATP analog at 1.1 Å resolution.
arginine.chem.cornell.edu /Structures/TGAK.html   (358 words)

  
 Lytic Cycle of Toxoplasma gondii -- Black and Boothroyd 64 (3): 607 -- Microbiology and Molecular Biology Reviews   (Site not responding. Last check: 2007-07-20)
Toxoplasma gondii is an obligate intracellular pathogen within the phylum Apicomplexa.
Toxoplasma is capable of infecting and replicating within virtually any nucleated mammalian or avian cell (41, 182).
Biochemical and molecular characterization of nucleoside triphosphate hydrolase isozymes from the parasitic protozoan Toxoplasma gondii.
mmbr.asm.org /cgi/content/full/64/3/607   (9540 words)

  
 Toxoplasma gondii   (Site not responding. Last check: 2007-07-20)
Toxoplasma gondii is a serious zoonotic parasite that can cause serious problems in unborn children and babies.
This intermediate host may be eaten by a predator, such as a cat (the definitive host).
Cats with acute infections of T. gondii are usually asymptomatic.
cvm.msu.edu /courses/mic569/docs/parasite/TOXO.HTML   (369 words)

  
 Structures of Toxoplasma gondii Tachyzoites, Bradyzoites, and Sporozoites and Biology and Development of Tissue Cysts ...   (Site not responding. Last check: 2007-07-20)
Infections by the protozoan parasite Toxoplasma gondii are widely prevalent worldwide in animals and humans.
gondii, one of which is escaping from the macrophage near the top of the micrograph (arrow).
gondii penetrating a neutrophil in mouse peritoneum; note the moving junction (Mj) at the site of penetration into the neutrophil and the extraordinary early development of the tubulovesicular membranes (Tv) in the space between the neutrophil and the tip of the tachyzoite.
cmr.asm.org /cgi/content/full/11/2/267   (8289 words)

  
 Discovery Health :: Diseases & Conditions :: toxoplasmosis
Toxoplasmosis is an infection caused by the parasite Toxoplasma gondii, also known as T. gondii.
People can acquire T. gondii by eating undercooked meats with the cysts or by swallowing the parasite in dirt or foods contaminated with cat feces.
The parasite, Toxoplasma gondii, is the cause of toxoplasmosis.
health.discovery.com /encyclopedias/illnesses.html?article=397   (542 words)

  
 Toxoplasma gondii Genome Project   (Site not responding. Last check: 2007-07-20)
Introduction  A brief summary of the Toxoplasma gondii genome project and a description of the organism.
Data Release Policy  Warnings on the use of preliminary data.
Toxoplasma gondii Links  Links to information on Toxoplasma gondii Genome and tools available from other sites.
www.tigr.org /tdb/e2k1/tga1   (150 words)

  
 The Loom : A Nation of Neurotics? Blame the Puppet Masters?   (Site not responding. Last check: 2007-07-20)
Toxoplasma gondii is an extraordinary creature, whose exploits I've chronicled in previous posts, an article in the New York Times and my book Parasite Rex.
Toxoplasma is astonishingly successful, able to live in thousands of species, including us.
As for toxoplasma, I speculated that this germ or some other is responsible for the condition known as "being a cat lover" (I'm a cat lover myself).
scienceblogs.com /loom/2006/08/01/a_nation_of_cowards_blame_the.php   (3926 words)

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