title: Collapse of Anopheles darlingi populations in Suriname after introduction of insecticide-treated nets (ITNs); malaria down to near elimination level.
abstract: A longitudinal study of malaria vectors was carried out in three villages in Suriname between 2006 and 2010. During 13,392 man hours of collections, 3,180 mosquitoes were collected, of which 33.7% were anophelines. Of these, Anopheles darlingi accounted for 88.1%, and An. nuneztovari accounted for 11.1%. The highest mean An. darlingi human biting rate (HBR) observed per survey was 1.43 bites/man per hour outdoor and 1.09 bites/man per hour indoor; 2 An. darlingi of the 683 tested were infected with Plasmodium falciparum. The anopheline HBR decreased to zero after the onset of malaria intervention activities, including insecticide-treated net (ITN) distribution, in 2006. Malaria transmission decreased to pre-elimination levels. It is concluded that the combination of ITN and climatic events has led to the collapse of malaria vector populations in the study sites in the interior of the country. The results are discussed in relation to the stability of malaria transmission in areas with low-density human populations.
authors.affiliation: Laboratory of Entomology, Wageningen University and Research Centre, Wageningen, The Netherlands. helenehiwat@gmail.com
authors.forename: Hélène
authors.initials: H
authors.lastname: Hiwat
authors.forename: Sutrisno
authors.initials: S
authors.lastname: Mitro
authors.forename: Ashok
authors.initials: A
authors.lastname: Samjhawan
authors.forename: Prem
authors.initials: P
authors.lastname: Sardjoe
authors.forename: Treyanti
authors.initials: T
authors.lastname: Soekhoe
authors.forename: Willem
authors.initials: W
authors.lastname: Takken
mesh_terms: D000818:Animals; D000852:Anopheles / Q000469:parasitology* / Q000502:physiology; D005260:Female; D006801:Humans; D007299:Insect Bites and Stings / Q000517:prevention & control; D007303:Insect Vectors / Q000469:parasitology; D057148:Insecticide-Treated Bednets / Q000706:statistics & numerical data*; D007306:Insecticides / Q000378:metabolism; D008137:Longitudinal Studies; D008288:Malaria / Q000517:prevention & control*; D008297:Male; D009032:Mosquito Control / Q000379:methods; D010963:Plasmodium falciparum / Q000302:isolation & purification; D010966:Plasmodium vivax / Q000302:isolation & purification; D011156:Population Density; D012621:Seasons; D012769:Shock / Q000378:metabolism*; D013532:Suriname
chemical_list: D007306:Insecticides