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A high prevalence of mixed trypanosome infections in tsetse flies in Sinfra, Côte d'Ivoire, detected by DNA amplification

Published online by Cambridge University Press:  06 April 2009

D. K. Masiga ,
J. J. McNamara ,
C. Laveissière ,
P. Truc  and
W. C. Gibson
D. K. Masiga
Affiliation:
Department of Pathology and Microbiology, School of Veterinary Science, University of Bristol, Longford House, Bristol BS18 7DY, UK
J. J. McNamara
Affiliation:
Department of Clinical Veterinary Science, University of Bristol, Longford House, Bristol BS18 7D Y, UK
C. Laveissière
Affiliation:
Institut Pierre Richet/OCCGE, BP 1500, Bouaké, Côte d'Ivoire
P. Truc
Affiliation:
Institut Pierre Richet/OCCGE, BP 1500, Bouaké, Côte d'Ivoire
W. C. Gibson
Affiliation:
Department of Pathology and Microbiology, School of Veterinary Science, University of Bristol, Longford House, Bristol BS18 7DY, UK
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Summary

The prevalence of various species and subgroups of trypanosomes in the Sinfra area of C⊚te d'Ivoire was determined using the polymerase chain reaction (PCR). Using this technique to amplify specific satellite DNA targets, it was possible to identify developmental-stage trypanosomes in the midguts and the proboscides of tsetse without expansion of parasite populations. The predominant tsetse species in the area was Glossina palpalis, while G. pallicera and G. nigrofusca were also present. Microscopical examination of 811 non-teneral flies revealed an infection rate of 14% in midguts and/or proboscides. Three subgroups of Trypanosoma congolense (Savannah, Forest & Kilifi), T. simiae, T.godfreyi, West African T. vivax and T. brucei ssp. were identified using PCR. T. congolense Forest was the most abundant of the Nannomonas trypanosomes. Approximately 40% of all infections were mixed, and there was a significantly higher prevalence of apparently mature T. brucei ssp. trypanosomes than has previously been reported. The present study demonstrates that PCR facilitates the easy identification of mature trypanosome infections in tsetse, providing a reliable estimation of trypanosomiasis challenge.

Keywords

polymerase chain reactiontsetse fliestrypanosomesmixed infections.
Type
Research Article
Information
Parasitology , Volume 112 , Issue 1 , January 1996 , pp. 75 - 80
Copyright
Copyright © Cambridge University Press 1996

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