Metacyclic Trypanosoma vivax possess a surface coat. 1986

P R Gardiner, and P Webster, and L Jenni, and S K Moloo

Coated metacyclics of Trypanosoma vivax exist in the hypopharynges of infected tsetse flies and are extruded in low numbers when the flies are induced to probe onto warm slides or into medium. After extensive searching of T. vivax-infected proboscides, and resort to a process for the examination of single, extruded, metacyclic trypanosomes, electron microscopic evidence is presented that, contrary to an earlier report, metacyclic T. vivax acquire a surface coat before contact with the mammalian host. Since T. vivax exhibits antigenic variation, the role of the surface coat in this species is likely to be functionally equivalent to the surface coat of the other tsetse-transmitted trypanosome species, T. brucei and T. congolense.

UI MeSH Term Description Entries
D008854 Microscopy, Electron Microscopy using an electron beam, instead of light, to visualize the sample, thereby allowing much greater magnification. The interactions of ELECTRONS with specimens are used to provide information about the fine structure of that specimen. In TRANSMISSION ELECTRON MICROSCOPY the reactions of the electrons that are transmitted through the specimen are imaged. In SCANNING ELECTRON MICROSCOPY an electron beam falls at a non-normal angle on the specimen and the image is derived from the reactions occurring above the plane of the specimen. Electron Microscopy
D002462 Cell Membrane The lipid- and protein-containing, selectively permeable membrane that surrounds the cytoplasm in prokaryotic and eukaryotic cells. Plasma Membrane,Cytoplasmic Membrane,Cell Membranes,Cytoplasmic Membranes,Membrane, Cell,Membrane, Cytoplasmic,Membrane, Plasma,Membranes, Cell,Membranes, Cytoplasmic,Membranes, Plasma,Plasma Membranes
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D014345 Trypanosoma A genus of flagellate protozoans found in the BLOOD and LYMPH of vertebrates and invertebrates, both hosts being required to complete the life cycle. Nannomonas,Trypanosomes,Nannomona,Trypanosome
D014370 Tsetse Flies Bloodsucking flies of the genus Glossina, found primarily in equatorial Africa. Several species are intermediate hosts of trypanosomes. Glossina,Flies, Tsetse,Fly, Tsetse,Glossinas,Tsetse Fly

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