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Negative density-dependent dispersal in tsetse flies: A risk for control campaigns?

De Meeus T., Ravel S., Solano P., Bouyer J.. 2019. Trends in Parasitology, 35 (8) : p. 615-621.

Tsetse flies are vectors of parasites that cause diseases responsible for significant economic losses and health issues in sub-Saharan Africa, including sleeping sickness in humans and nagana in domestic animals. Efficient vector-control campaigns require good knowledge of the demographic parameters of the targeted populations. In the last decade, population genetics emerged as a convenient way to measure population densities and dispersal in tsetse flies. Here, by revealing a strong negative density-dependent dispersal in two dimensions, we suggest that control campaigns might unleash dispersal from untreated areas. If confirmed by direct measurement of dispersal before and after control campaigns, area-wide and/or sequential treatments of neighboring sites will be necessary to prevent this issue.

Mots-clés : distribution géographique; surveillance épidémiologique; glossina; afrique au sud du sahara

Thématique : Maladies des animaux; Ecologie animale

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