TRYPANOSOMA

10問 • 2年前

問題一覧

____________ • Flagellated protozoan parasites that live in the blood, lymph and various tissues of their vertebrate hosts • Parasites of all vertebrate classes • majority are transmitted by blood- feeding invertebrates, although other transmission mechanisms exist

TRYPANOSOMA

Morphological Forms of Trypanosoma ____________ (Leishmanial) -2-3µm Leishmania amastigote maybe the smallest eukaryotic cells -flagellum is very short, projecting only slightly beyond the flagellar pocket

Amastigote

Morphological Forms of Trypanosoma _____________ (Leptomonad) -elongated body with flagellum extending forward as a functional organelle -kinetosome and kinetoplast are located in front of the nucleus, near the anterior end of the body

Promastigote

Morphological Forms of Trypanosoma __________ (Crithidial) -kinetoplast and kinetosome are still located between the nucleus and the anterior end, but a short undulating membrane lies along the proximal part of the flagellum

Epimastigote

Morphological Forms of Trypanosoma _____________ (Trypanosome) -kinetoplast and kinetosome are near to the posterior end of the body -flagellum runs along the surface, usually continuing as a free whip anterior to the body

Trypomastigote

Sections of Trypanosoma Trypanosomes are divided into two broad groups: 1. ___________ - develops at the anterior portions of the digestive tract (anterior station) -eg.. T. brucei ssp.. T. evansi, T. congolense, T. vivax 2. ___________ - develop at the vector's hindgut (posterior station) -eg.. T. cruzi, T. lewisi, T. theileiri, T. melophagium T canorini

Salivaria, Stercoraria

Sections of Trypanosoma Trypanosomes are divided into two broad groups: 1. ____________ - blood and tissue parasites 2. ____________ - associated with the mucous membrane; live in the mouth and the cecum/colon

Hemoflagellates, Mucoflagellates

Pathogenesis of HAT • ________ - develops where metacyclic trypanosomes are inoculated • Swollen and congested lymph nodes (Winterbottom's sign) at neck, groin, and legs

Chancre

Pathogenesis of Sleeping Sickness • _________ - rapid weight loss and heart involvement; no somnambulism or other protracted nervous disorders • _________ - invade the central nervous system, they initiate the chronic, sleeping-sickness stage of infection

T. b. rhodesiense, T. b. gambiense

Antigenic Variation of Trypanosoma _____________ - antigen where the host responds by producing specific antibodies to eliminate the proliferating trypanosomes ____________ - protective protein coat that undergoes antigenic variation

Variable Antigen Type, Variant-specific glycoprotein

PHYSIO LEC MODULE 7

Reinhard Lowell Sabido · 48問 · 2年前

PHYSIO LEC MODULE 7