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The blood-stages of Plasmodium georgesi, P. gonderi and P. petersi: course of untreated infection in their natural hosts and additional morphological distinctive features

Published online by Cambridge University Press:  06 April 2009

J. Poirriez ,
E. Dei-Cas ,
L. Dujardin  and
I. Landau
J. Poirriez
Affiliation:
Laboratoire de Biologic, Centre Hospitalier, 130 Avenue Louis Herbeaux, B.P. 6367, 59385 Dimkerque Cédex 1, France
E. Dei-Cas
Affiliation:
INSERM U42, 369 Rue Jules Guesde, B.P. 39, 59651 Villeneuve d' Ascq Cédex, France
L. Dujardin
Affiliation:
Laboratoire de Parasitologie, Faculté des Sciences Pharmaceutiques, 3 Rue du Professeur Laguesse, BP 83, 59006 Lille Cédex, France
I. Landau
Affiliation:
Laboratoire de Biologie Parasitaire et Chimiothérapie associé au CNRS, URA 114, Muséum National d' Histoire Naturelle, 61 Rue Buffon, 75231 Paris Cédex 05, France
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Summary

In the blood of a Cercocebus albigena and of a C. galeritus agilis monkey, the infection with Plasmodium gonderi was found to follow its well-known chronic course; P. georgesi seemed to occur as a relapsing type of malaria parasite; P. petersi was found for only a few days and at a low level in C. albigena (end of an attack?). As shown by using polarized light, the pigment granules appeared mostly as fine dots in P. georgesi, short rods in P. gonderi and long needles in P. petersi. The three species can be distinguished by the morphological appearance of the nucleus of the young trophozoites, and also by the measurement of its surface area (Sa): small round nucleus (Sa= 0·81 ± 0·06 μm2) in P. gonderi, large 2-coloured nucleus (Sa= 1·43 ± 0·21 μm2) in P. petersi, and long crescent-shaped nucleus (Sa= 2·18±0·25 μm2) in P. georgesi. The first colour illustrations of the blood-stages of P. georgesi are presented. The dynamics of single and mixed blood infections in primate malaria parasites are discussed, with a proposal to classify them into 3 types.

Keywords

Plasmodium georgesiP. gonderiP. petersiCercocebus monkeys
Type
Research Article
Information
Parasitology , Volume 111 , Issue 5 , December 1995 , pp. 547 - 554
Copyright
Copyright © Cambridge University Press 1995

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