Low and seasonal malaria transmission in ...
Document type :
Article dans une revue scientifique: Article original
DOI :
PMID :
Title :
Low and seasonal malaria transmission in the middle Senegal River basin: identification and characteristics of Anopheles vectors.
Author(s) :
Ndiath, Mamadou [Auteur correspondant]
Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes [URMITE]
Sarr, Jean-Biram [Auteur]
Maladies infectieuses et vecteurs : écologie, génétique, évolution et contrôle [MIVEGEC]
Gaayeb, Lobna [Auteur]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Mazenot, Catherine [Auteur]
Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes [URMITE]
Sougoufara, Seynabou [Auteur]
Université Cheikh Anta Diop de Dakar [Sénégal] [UCAD]
Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes [URMITE]
Konate, Lassana [Auteur]
Université Cheikh Anta Diop de Dakar [Sénégal] [UCAD]
Remoue, Franck [Auteur]
Vector Control Group [MIVEGEC-VCG]
Hermann, Emmanuel [Auteur]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Trape, Jean-Francois [Auteur]
Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes [URMITE]
Riveau, Gilles [Auteur]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Sokhna, Cheikh [Auteur]
Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes [URMITE]
Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes [URMITE]
Sarr, Jean-Biram [Auteur]
Maladies infectieuses et vecteurs : écologie, génétique, évolution et contrôle [MIVEGEC]
Gaayeb, Lobna [Auteur]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Mazenot, Catherine [Auteur]
Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes [URMITE]
Sougoufara, Seynabou [Auteur]
Université Cheikh Anta Diop de Dakar [Sénégal] [UCAD]
Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes [URMITE]
Konate, Lassana [Auteur]
Université Cheikh Anta Diop de Dakar [Sénégal] [UCAD]
Remoue, Franck [Auteur]
Vector Control Group [MIVEGEC-VCG]
Hermann, Emmanuel [Auteur]

Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Trape, Jean-Francois [Auteur]
Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes [URMITE]
Riveau, Gilles [Auteur]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Sokhna, Cheikh [Auteur]
Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes [URMITE]
Journal title :
Parasites & Vectors
Pages :
21
Publisher :
BioMed Central
Publication date :
2012-01-23
ISSN :
1756-3305
English keyword(s) :
Malaria transmission
Anopheles arabiensis
Plasmodium infection
KDR mutation
Senegal River basin
Anopheles arabiensis
Plasmodium infection
KDR mutation
Senegal River basin
HAL domain(s) :
Sciences du Vivant [q-bio]/Médecine humaine et pathologie/Maladies infectieuses
English abstract : [en]
ABSTRACT: BACKGROUND: During the last decades two dams were constructed along the Senegal River. These intensified the practice of agriculture along the river valley basin. We conducted a study to assess malaria vector ...
Show more >ABSTRACT: BACKGROUND: During the last decades two dams were constructed along the Senegal River. These intensified the practice of agriculture along the river valley basin. We conducted a study to assess malaria vector diversity, dynamics and malaria transmission in the area. METHODS: A cross-sectional entomological study was performed in September 2008 in 20 villages of the middle Senegal River valley to evaluate the variations of Anopheles density according to local environment. A longitudinal study was performed, from October 2008 to January 2010, in 5 selected villages, to study seasonal variations of malaria transmission. RESULTS: Among malaria vectors, 72.34% of specimens collected were An. arabiensis, 5.28% An. gambiae of the S molecular form, 3.26% M form, 12.90% An. pharoensis, 4.70% An. ziemanni, 1.48% An. funestus and 0.04% An. wellcomei. Anopheles density varied according to village location. It ranged from 0 to 21.4 Anopheles/room/day and was significantly correlated with the distance to the nearest ditch water but not to the river. Seasonal variations of Anopheles density and variety were observed with higher human biting rates during the rainy season (8.28 and 7.55 Anopheles bite/man/night in October 2008 and 2009 respectively). Transmission was low and limited to the rainy season (0.05 and 0.06 infected bite/man/night in October 2008 and 2009 respectively). During the rainy season, the endophagous rate was lower, the anthropophagic rate higher and L1014F kdr frequency higher. CONCLUSIONS: Malaria vectors are present at low-moderate density in the middle Senegal River basin with An. arabiensis as the predominant species. Other potential vectors are An. gambiae M and S form and An. funestus. Nonetheless, malaria transmission was extremely low and seasonal.Show less >
Show more >ABSTRACT: BACKGROUND: During the last decades two dams were constructed along the Senegal River. These intensified the practice of agriculture along the river valley basin. We conducted a study to assess malaria vector diversity, dynamics and malaria transmission in the area. METHODS: A cross-sectional entomological study was performed in September 2008 in 20 villages of the middle Senegal River valley to evaluate the variations of Anopheles density according to local environment. A longitudinal study was performed, from October 2008 to January 2010, in 5 selected villages, to study seasonal variations of malaria transmission. RESULTS: Among malaria vectors, 72.34% of specimens collected were An. arabiensis, 5.28% An. gambiae of the S molecular form, 3.26% M form, 12.90% An. pharoensis, 4.70% An. ziemanni, 1.48% An. funestus and 0.04% An. wellcomei. Anopheles density varied according to village location. It ranged from 0 to 21.4 Anopheles/room/day and was significantly correlated with the distance to the nearest ditch water but not to the river. Seasonal variations of Anopheles density and variety were observed with higher human biting rates during the rainy season (8.28 and 7.55 Anopheles bite/man/night in October 2008 and 2009 respectively). Transmission was low and limited to the rainy season (0.05 and 0.06 infected bite/man/night in October 2008 and 2009 respectively). During the rainy season, the endophagous rate was lower, the anthropophagic rate higher and L1014F kdr frequency higher. CONCLUSIONS: Malaria vectors are present at low-moderate density in the middle Senegal River basin with An. arabiensis as the predominant species. Other potential vectors are An. gambiae M and S form and An. funestus. Nonetheless, malaria transmission was extremely low and seasonal.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
European Project :
Source :
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