Population genetics of Glossina palpalis palpalis from central African sleeping sickness foci
Trésor Tito Tanekou,TT Melachio,Gustave Simo,Sophie Ravel,Thierry De Meeûs,Sandrine Causse,Philippe Solano,Pascal Lutumba,Tazoacha Asonganyi,Flobert Njiokou +9 more
TLDR
This first investigation of population genetic structure of G. p.Abstract:
Background: Glossina palpalis palpalis (Diptera: Glossinidae) is widespread in west Africa, and is the main vector of sleeping sickness in Cameroon as well as in the Bas Congo Province of the Democratic Republic of Congo. However, little is known on the structure of its populations. We investigated G. p. palpalis population genetic structure in five sleeping sickness foci (four in Cameroon, one in Democratic Republic of Congo) using eight microsatellite DNA markers. Results: A strong isolation by distance explains most of the population structure observed in our sampling sites of Cameroon and DRC. The populations here are composed of panmictic subpopulations occupying fairly wide zones with a very strong isolation by distance. Effective population sizes are probably between 20 and 300 individuals and if we assume densities between 120 and 2000 individuals per km 2 , dispersal distance between reproducing adults and their parents extends between 60 and 300 meters. Conclusions: This first investigation of population genetic structure of G. p. palpalis in Central Africa has evidenced random mating subpopulations over fairly large areas and is thus at variance with that found in West African populations of G. p. palpalis. This study brings new information on the isolation by distance at a macrogeographic scale which in turn brings useful information on how to organise regional tsetse control. Future investigations should be directed at temporal sampling to have more accurate measures of demographic parameters in order to help vector control decision.read more
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Revisiting FIS, FST, Wahlund Effects, and Null Alleles.
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References
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Evidence for a discrete evolutionary lineage within Equatorial Guinea suggests that the tsetse fly Glossina palpalis palpalis exists as a species complex.
Naomi A. Dyer,Andreia Furtado,Jorge Cano,Filipa Santana Ferreira,M. Odete Afonso,Nicolas Ndong-Mabale,Pedro Ndong-Asumu,Sónia Centeno-Lima,Agustín Benito,David Weetman,Martin J. Donnelly,João Pinto +11 more
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Spatial and Temporal Patterns of Human African Trypanosomosis (HAT) Transmission Risk in the Bipindi Focus, in the Forest Zone of Southern Cameroon
Pascal Grébaut,J.A. Mbida Mbida,C. Antonio Kondjio,Flobert Njiokou,Laurent Penchenier,C. Laveissiere +5 more
TL;DR: A transmission risk index was used in the HAT focus of Bipindi, in the forest zone of southern Cameroon, and a simplified version of the index originally developed by Laveissière et al. in 1994 was used.
Journal ArticleDOI
Population structure of Glossina palpalis gambiensis (Diptera: Glossinidae) between river basins in Burkina Faso: consequences for area-wide integrated pest management.
Jérémy Bouyer,Sophie Ravel,Laure Guerrini,Jean-Pierre Dujardin,Issa Sidibé,Marc J. B. Vreysen,Philippe Solano,Thierry De Meeûs,Thierry De Meeûs +8 more
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Journal Article
The focus of human trypanosomiasis in Campo (Cameroon). History and endemic situation in 1998
Laurent Penchenier,Pascal Grébaut,V. Ebo'o Eyenga,J.M. Bodo,Flobert Njiokou,J J Binzouli,P Simarro,G Soula,Stéphane Herder,Claude Laveissière +9 more
TL;DR: The results show that the Campo focus is active only on the Cameroonian side, centred on the village of Ipono with a limited prevalence, and the persisting epidemic is most likely to be associated with the presence of pigs carrying the Trypanosoma brucei gambiense which was identified during the study in I pono.
Journal ArticleDOI
Population structuring of the tsetse Glossina tachinoides resulting from landscape fragmentation in the Mouhoun River basin, Burkina Faso.
Naférima Koné,T. De Meeûs,Jérémy Bouyer,Sophie Ravel,Laure Guerrini,Eliézer K. N’Goran,L. Vial +6 more
TL;DR: The impact of landscape fragmentation resulting from human‐ and climate‐mediated factors on the structure of a population of Glossina tachinoides Westwood (Diptera: Glossinidae) in the Mouhoun River basin, Burkina Faso, was investigated.
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