title: Spatio-temporal variations of Anopheles coluzzii and An. gambiae and their Plasmodium infectivity rates in Lobito, Angola.
abstract: From 2003 to 2007, entomological surveys were conducted in Lobito town (Benguela Province, Angola) to determine which Anopheles species were present and to identify the vectors responsible for malaria transmission in areas where workers of the Sonamet Company live. Two types of surveys were conducted: (1) time and space surveys in the low and upper parts of Lobito during the rainy and dry periods; (2) a two-year longitudinal study in Sonamet workers' houses provided with long-lasting insecticide-treated nets (LLIN), "PermaNet," along with the neighboring community. Both species, An. coluzzii (M molecular form) and An. gambiae (S molecular form), were collected. Anopheles coluzzii was predominant during the dry season in the low part of Lobito where larvae develop in natural ponds and temporary pools. However, during the rainy season, An. gambiae was found in higher proportions in the upper part of the town where larvae were collected in domestic water tanks built near houses. Anopheles melas and An. listeri were captured in higher numbers during the dry season and in the low part of Lobito where larvae develop in stagnant brackish water pools. The infectivity rates of An. gambiae s.l. varied from 0.90% to 3.41%.
authors.affiliation: Institut de Recherche pour le Développement (IRD), Montpellier, France, 34394.
authors.forename: Pierre
authors.initials: P
authors.lastname: Carnevale
authors.affiliation: Organisation de Coordination pour la lutte contre les Endémies en Afrique Centrale (OCEAC), Yaoundé, BP, Cameroun, 288.
authors.forename: Jean-Claude
authors.initials: JC
authors.lastname: Toto
authors.affiliation: Medical Service of Sonamet, Lobito, Angola.
authors.forename: Patrick
authors.initials: P
authors.lastname: Besnard
authors.affiliation: Malaria Control Programme, Sonamet, Angola.
authors.forename: Maria Adelaide Dos
authors.initials: MA
authors.lastname: Santos
authors.affiliation: National Malaria Control Programme, Luanda, Angola.
authors.forename: Filomeno
authors.initials: F
authors.lastname: Fortes
authors.affiliation: The Mentor Initiative, Crawley, United Kingdom.
authors.forename: Richard
authors.initials: R
authors.lastname: Allan
authors.affiliation: Institut de Recherche pour le Développement (IRD), UMR-MD3, Montpellier, France, 34093. sylvie.manguin@ird.fr.
authors.forename: Sylvie
authors.initials: S
authors.lastname: Manguin
mesh_terms: D000810:Angola / Q000453:epidemiology; D000818:Animals; D000852:Anopheles / Q000469:parasitology*; D017753:Ecosystem; D006801:Humans; D007303:Insect Vectors / Q000469:parasitology*; D057148:Insecticide-Treated Bednets; D007814:Larva; D008137:Longitudinal Studies; D008288:Malaria / Q000453:epidemiology / Q000635:transmission; D009032:Mosquito Control / Q000379:methods*; D010963:Plasmodium falciparum / Q000302:isolation & purification / Q000472:pathogenicity*; D012621:Seasons; D062211:Spatio-Temporal Analysis; D011795:Surveys and Questionnaires
keywords: Angola.; Anopheles coluzzii; Anopheles gambiae; infectivity; malaria