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Trapping tsetse flies on water.

C Laveissière1, M Camara, J B Rayaisse

  • 1380, route de la Virvée, 33240 Saint-Romain-la-Virvée, France.

Parasite (Paris, France)
|June 18, 2011
PubMed
Summary

New water-based traps effectively catch riverine tsetse flies (Glossina palpalis gambiensis and G. tachinoides), vectors of trypanosomoses. This innovation significantly improves tsetse fly detection and control in West African riverine and mangrove habitats.

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Area of Science:

  • Medical Entomology
  • Tropical Public Health
  • Vector Ecology

Background:

  • Riverine tsetse flies (Glossina spp.) transmit human and animal trypanosomoses in West Africa.
  • Tsetse fly trapping traditionally relies on terrestrial methods, overlooking aquatic environments.
  • Tsetse fly abundance is influenced by trap height, posing challenges in tidal mangrove ecosystems.

Purpose of the Study:

  • To develop and evaluate novel water-based trapping devices for riverine tsetse flies.
  • To assess the efficacy of these aquatic traps in mangrove and savannah riverine habitats.
  • To explore new strategies for tsetse fly control and disease vector surveillance.

Main Methods:

  • Modified biconical traps were deployed on floating platforms in mangrove (Guinea) and riverine savannah (Burkina Faso) environments.
  • In mangrove areas, traps were designed to rise and fall with tidal fluctuations.
  • Trap catches were compared with classical terrestrial traps in savannah habitats.

Main Results:

  • A novel water-based trap in Guinea achieved significantly higher catches (93.9 flies/trap/day) compared to traditional methods in other habitats.
  • In Burkina Faso savannah, aquatic traps showed comparable densities of Glossina palpalis gambiensis and G. tachinoides to shore-based traps.
  • This study reports the first successful deployment of tsetse traps on water surfaces.

Conclusions:

  • Water-based traps offer a highly efficient method for capturing riverine tsetse flies, particularly in challenging tidal mangrove environments.
  • These adapted traps present significant potential for enhanced trypanosomiasis vector surveillance and control in West Africa.
  • The technology has been recognized for its utility by national control programs in Guinea and Burkina Faso.