Highly focused anopheline breeding sites and malaria transmission in Dakar
Abstract Background Urbanization has a great impact on the composition of the vector system and malaria transmission dynamics. In Dakar, some malaria cases are autochthonous but parasite rates and incidences of clinical malaria attacks have been recorded at low levels. Ecological heterogeneity of ma...
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ftdoajarticles:oai:doaj.org/article:80053225cd5e4cd0813d061495bbf2ee 2023-05-15T15:16:44+02:00 Highly focused anopheline breeding sites and malaria transmission in Dakar Bouzid Samia Jarjaval Fanny Vignolles Cécile Gadiaga Libasse Machault Vanessa Sokhna Cheikh Lacaux Jean-Pierre Trape Jean-François Rogier Christophe Pagès Frédéric 2009-06-01T00:00:00Z https://doi.org/10.1186/1475-2875-8-138 https://doaj.org/article/80053225cd5e4cd0813d061495bbf2ee EN eng BMC http://www.malariajournal.com/content/8/1/138 https://doaj.org/toc/1475-2875 doi:10.1186/1475-2875-8-138 1475-2875 https://doaj.org/article/80053225cd5e4cd0813d061495bbf2ee Malaria Journal, Vol 8, Iss 1, p 138 (2009) Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 article 2009 ftdoajarticles https://doi.org/10.1186/1475-2875-8-138 2022-12-31T00:52:09Z Abstract Background Urbanization has a great impact on the composition of the vector system and malaria transmission dynamics. In Dakar, some malaria cases are autochthonous but parasite rates and incidences of clinical malaria attacks have been recorded at low levels. Ecological heterogeneity of malaria transmission was investigated in Dakar, in order to characterize the Anopheles breeding sites in the city and to study the dynamics of larval density and adult aggressiveness in ten characteristically different urban areas. Methods Ten study areas were sampled in Dakar and Pikine. Mosquitoes were collected by human landing collection during four nights in each area (120 person-nights). The Plasmodium falciparum circumsporozoite (CSP) index was measured by ELISA and the entomological inoculation rates (EIR) were calculated. Open water collections in the study areas were monitored weekly for physico-chemical characterization and the presence of anopheline larvae. Adult mosquitoes and hatched larvae were identified morphologically and by molecular methods. Results In September-October 2007, 19,451 adult mosquitoes were caught among which, 1,101 were Anopheles gambiae s.l . The Human Biting Rate ranged from 0.1 bites per person per night in Yoff Village to 43.7 in Almadies. Seven out of 1,101 An. gambiae s.l . were found to be positive for P. falciparum (CSP index = 0.64%). EIR ranged from 0 infected bites per person per year in Yoff Village to 16.8 in Almadies. The An . gambiae complex population was composed of Anopheles arabiensis (94.8%) and Anopheles melas (5.2%). None of the An. melas were infected with P. falciparum . Of the 54 water collection sites monitored, 33 (61.1%) served as anopheline breeding sites on at least one observation. No An . melas was identified among the larval samples. Some physico-chemical characteristics of water bodies were associated with the presence/absence of anopheline larvae and with larval density. A very close parallel between larval and adult densities was found in six of the ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Malaria Journal 8 1 138 |
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Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
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Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 Bouzid Samia Jarjaval Fanny Vignolles Cécile Gadiaga Libasse Machault Vanessa Sokhna Cheikh Lacaux Jean-Pierre Trape Jean-François Rogier Christophe Pagès Frédéric Highly focused anopheline breeding sites and malaria transmission in Dakar |
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Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
description |
Abstract Background Urbanization has a great impact on the composition of the vector system and malaria transmission dynamics. In Dakar, some malaria cases are autochthonous but parasite rates and incidences of clinical malaria attacks have been recorded at low levels. Ecological heterogeneity of malaria transmission was investigated in Dakar, in order to characterize the Anopheles breeding sites in the city and to study the dynamics of larval density and adult aggressiveness in ten characteristically different urban areas. Methods Ten study areas were sampled in Dakar and Pikine. Mosquitoes were collected by human landing collection during four nights in each area (120 person-nights). The Plasmodium falciparum circumsporozoite (CSP) index was measured by ELISA and the entomological inoculation rates (EIR) were calculated. Open water collections in the study areas were monitored weekly for physico-chemical characterization and the presence of anopheline larvae. Adult mosquitoes and hatched larvae were identified morphologically and by molecular methods. Results In September-October 2007, 19,451 adult mosquitoes were caught among which, 1,101 were Anopheles gambiae s.l . The Human Biting Rate ranged from 0.1 bites per person per night in Yoff Village to 43.7 in Almadies. Seven out of 1,101 An. gambiae s.l . were found to be positive for P. falciparum (CSP index = 0.64%). EIR ranged from 0 infected bites per person per year in Yoff Village to 16.8 in Almadies. The An . gambiae complex population was composed of Anopheles arabiensis (94.8%) and Anopheles melas (5.2%). None of the An. melas were infected with P. falciparum . Of the 54 water collection sites monitored, 33 (61.1%) served as anopheline breeding sites on at least one observation. No An . melas was identified among the larval samples. Some physico-chemical characteristics of water bodies were associated with the presence/absence of anopheline larvae and with larval density. A very close parallel between larval and adult densities was found in six of the ... |
format |
Article in Journal/Newspaper |
author |
Bouzid Samia Jarjaval Fanny Vignolles Cécile Gadiaga Libasse Machault Vanessa Sokhna Cheikh Lacaux Jean-Pierre Trape Jean-François Rogier Christophe Pagès Frédéric |
author_facet |
Bouzid Samia Jarjaval Fanny Vignolles Cécile Gadiaga Libasse Machault Vanessa Sokhna Cheikh Lacaux Jean-Pierre Trape Jean-François Rogier Christophe Pagès Frédéric |
author_sort |
Bouzid Samia |
title |
Highly focused anopheline breeding sites and malaria transmission in Dakar |
title_short |
Highly focused anopheline breeding sites and malaria transmission in Dakar |
title_full |
Highly focused anopheline breeding sites and malaria transmission in Dakar |
title_fullStr |
Highly focused anopheline breeding sites and malaria transmission in Dakar |
title_full_unstemmed |
Highly focused anopheline breeding sites and malaria transmission in Dakar |
title_sort |
highly focused anopheline breeding sites and malaria transmission in dakar |
publisher |
BMC |
publishDate |
2009 |
url |
https://doi.org/10.1186/1475-2875-8-138 https://doaj.org/article/80053225cd5e4cd0813d061495bbf2ee |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Malaria Journal, Vol 8, Iss 1, p 138 (2009) |
op_relation |
http://www.malariajournal.com/content/8/1/138 https://doaj.org/toc/1475-2875 doi:10.1186/1475-2875-8-138 1475-2875 https://doaj.org/article/80053225cd5e4cd0813d061495bbf2ee |
op_doi |
https://doi.org/10.1186/1475-2875-8-138 |
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Malaria Journal |
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8 |
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1 |
container_start_page |
138 |
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1766347021680115712 |