title: Insecticide susceptibility of Aedes aegypti populations from Senegal and Cape Verde Archipelago.
abstract: BACKGROUND
  Two concomitant dengue 3 (DEN-3) epidemics occurred in Cape Verde Archipelago and Senegal between September and October 2009. Aedes aegypti was identified as the vector of these epidemics as several DEN-3 virus strains were isolated from this species in both countries. The susceptibility to pyrethroids, organochlorine, organophosphates and carbamate was investigated in two field strains of Aedes aegypti from both countries using WHO diagnostic bioassay kits in order to monitor their the current status of insecticide susceptibility.
  
  
  RESULTS
  The two tested strains were highly resistant to DDT. The Cape Verde strain was found to be susceptible to all others tested insecticides except for propoxur 0.1%, which needs further investigation. The Dakar strain was susceptible to fenitrothion 1% and permethrin 0.75%, but displayed reduced susceptibility to deltamethrin, lambda-cyhalothrin and propoxur.
  
  
  CONCLUSIONS
  As base-line results, our observations stress a careful management of insecticide use for the control of Ae. aegypti. Indeed, they indicate that DDT is no longer efficient for the control of Ae. aegypti populations in Cape Verde and Dakar and further suggest a thorough follow-up of propoxur susceptibility status in both sites and that of deltamethrin and lambda-cyhalothrin in Ae. aegypti populations in Dakar. Thus, regular monitoring of susceptibility is greatly needed as well as the knowing if this observed resistance/susceptibility is focal or not and for observed resistance, the use of biochemical methods is needed with detailed comparison of resistance levels over a large geographic area.
  
  
  BACKGROUND
  Aedes aegypti, Insecticides, Susceptibility, Cape Verde, Senegal.
authors.affiliation: Unité d'entomologie médicale, Institut Pasteur de Dakar, 36 Avenue Pasteur, Dakar BP 220, Sénégal. dia@pasteur.sn
authors.forename: Ibrahima
authors.initials: I
authors.lastname: Dia
authors.forename: Cheikh Tidiane
authors.initials: CT
authors.lastname: Diagne
authors.forename: Yamar
authors.initials: Y
authors.lastname: Ba
authors.forename: Diawo
authors.initials: D
authors.lastname: Diallo
authors.forename: Lassana
authors.initials: L
authors.lastname: Konate
authors.forename: Mawlouth
authors.initials: M
authors.lastname: Diallo
mesh_terms: D000330:Aedes / Q000187:drug effects*; D000818:Animals; D055726:Cabo Verde; D004199:Disease Vectors; D005260:Female; D007305:Insecticide Resistance; D007306:Insecticides / Q000494:pharmacology*; D012675:Senegal
chemical_list: D007306:Insecticides