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Metacyclic Trypanosoma vivax possess a surface coat

Published online by Cambridge University Press:  06 April 2009

P. R Gardiner ,
P Webster ,
L Jenni  and
S. K Moloo
P. R Gardiner
Affiliation:
International Laboratory for Research on Animal Diseases, P.O. Box 30709, Nairobi, Kenya
P Webster
Affiliation:
International Laboratory for Research on Animal Diseases, P.O. Box 30709, Nairobi, Kenya
L Jenni
Affiliation:
Swiss Tropical Institute, Socinstrasse 57, CH-4051 Basel, Switzerland
S. K Moloo
Affiliation:
International Laboratory for Research on Animal Diseases, P.O. Box 30709, Nairobi, Kenya
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Summary

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 micro scopic evidence is presented that, contrary to an earlier report, metacyclic T. vivaxacquire 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.

Type
Research Article
Information
Parasitology , Volume 92 , Issue 1 , February 1986 , pp. 75 - 82
Copyright
Copyright © Cambridge University Press 1986

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