Active dispersal by wild Triatoma infestans in the Bolivian Andes

Wilfrid Richer, Pierre Kengne, Mirko Rojas Cortez, Marie Mathilde Perrineau, Anna Cohuet, Didier Fontenille, François Noireau

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Triatoma infestans is the main vector of Chagas disease and target of control programmes in the Southern Cone countries. So far Bolivia is the only country where true T. infestans wild foci are documented. The dispersal ability for wild T. infestans was studied at microgeographical scale in Bolivian Andes, to assess the possibility for wild populations to actively recolonize insecticide-treated villages. Nine microsatellite loci were used to detect the extent of gene flow between neighbouring collecting sites. The detection of restricted gene flow between close but distinct sylvatic sites supports the hypothesis that wild T. infestans does not disperse by flying at high altitude (2,750 m asl). It gradually disperses over small distances by walking within a 'patch' of continuous land cover. The genetic differentiation detected between sylvatic and domestic populations suggests a limited short-term role of wild insects in the process of recolonization of insecticide-treated houses in the Andes.

Original languageEnglish
Pages (from-to)759-64
Number of pages6
JournalTropical medicine & international health : TM & IH
Volume12
Issue number6
Early online date17 Apr 2007
DOIs
Publication statusPublished - 5 Jun 2007

Keywords

  • Altitude
  • Animals
  • Bolivia/epidemiology
  • Chagas Disease/epidemiology
  • Gene Amplification/genetics
  • Genotype
  • Humans
  • Insect Vectors/genetics
  • Linkage Disequilibrium/genetics
  • Microsatellite Repeats/genetics
  • Population Growth
  • Rural Health
  • Trees
  • Triatoma/genetics

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