Trypanosoma


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Related to Trypanosoma: Leishmania, trypanosomiasis, Trypanosoma brucei, Trypanosoma gambiense

Trypanosoma

 

a genus of protozoans of the class Flagellata that parasitize the blood and tissues of vertebrates, including man. There are several dozen species, many of which are pathogenic. The body is spindle-shaped and has a single nucleus. The flagellum originates in the cytoplasm of the posterior third of the body from the basal corpuscle. It protrudes freely and forms an undulating membrane with the fold of the pellicle. Alongside it is a kinetoplast, a mitochondrion-like organelle that abounds in DNA. Members of the genus reproduce by longitudinal division. There is no sexual process. Most species penetrate into the body of a vertebrate animal or man through transmitters, usually in-sects. The insects either transmit the parasites mechanically with their piercing mouth parts or serve as temporary hosts to the parasites, which reproduce and undergo a succession of morphological changes, becoming crithidiae and leptomonae.

T. gambiense and T. rhodesiense are pathogenic for man; they cause African sleeping sickness, transmitted by flies of the genus Glossina. T. evansi (the causative agent of surra) and T. brucei (the causative agent of nagana) parasitize cattle in Africa and India. In the USSR, camels suffer from su-auru, caused by T. ninaekohlyakimovi, and horses and donkeys suffer from dourine, caused by T. equiperdum.

IU. I. POLIANSKII

References in periodicals archive ?
Therapeutic activity and criterion of cure in mice experimentally infected with Trypanosoma cruzi.
Trypanosoma cruzi and Chagas' disease in the United States.
We examined blood smears from 139 Northern Saw-whet Owls and detected five groups of haematozoa, Leucocytozoon, Plasmodium, microfilaria, Haemoproteus, and Trypanosoma (Fig.
Distribution and infection of triatomines (Hemiptera: Reduviidae) by Trypanosoma cruzi in the state of Michoacan, Mexico.
Khartoum-26 -6-2013-(SUNA)_ Tsetse fly is a dangerous insect as it carries trypanosoma brucei germ which causes death to cattle and transmits the "Sleeping sickness" to humans , while suspected of causing (Rabies) .
Sleeping sickness is caused by the unicellular organism Trypanosoma brucei that is transmitted by tsetse flies.
Chagas disease is caused by Trypanosoma cruzi, and is considered a public health problem.
Chagas disease or American trypanosomiasis is caused by the hemoflagellate protozoan Trypanosoma cruzi Chagas, which was identified by the Brazilian physician Carlos R.
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.
2,3) There are two forms of illness: a more chronic infection caused by the protozoan parasite Trypanosoma brucei rhodesiense (West African) and a more acute disease caused by Trypanosoma brucei gambiense (East African).
Evaluation of Trypanosoma cruzi 30dH biotherapic: an in vitro study.
Twenty-nine road-killed opossums (Didelphis virginiana) collected from Baldwin County, central Georgia, were tested for the presence of Trypanosoma cruzi with polymerase chain reaction (PCR) analysis.