Residual malaria transmission and the role of Anopheles arabiensisand Anopheles melasin central Senegal
In: Journal of Medical Entomology, Jg. 60 (2023-05-01), Heft 3, S. 546-553
Online
serialPeriodical
Zugriff:
Understanding the behavior and ecology of local malaria vectors is essential for the effectiveness of the commonly used vector-targeted malaria control tools in areas of low malaria transmission. This study was conducted to determine species composition, biting behavior and infectivity of the major Anophelesvectors of Plasmodium falciparumin low transmission settings in central Senegal. Adult mosquitoes were collected using human landing catches during 2 consecutive nights and Pyrethrum Spray Catches in 30–40 randomly selected rooms, from July 2017 to December 2018 in 3 villages. Anopheline mosquitoes were morphologically identified using conventional keys; their reproductive status assessed by ovary dissections, and a sub-sample of Anopheles gambiaes.l. were identified to species level using polymerase chain reaction (PCR). Plasmodiumsporozoite infections were detected using real-time quantitative PCR. During this study 3684 Anopheleswere collected of which 97% were An. gambiaes.l., 0.6% were Anopheles funestus, and 2.4% were Anopheles pharoensis. Molecular identification of 1,877 An. gambiaes.l. revealed a predominance of Anopheles arabiensis(68.7%), followed by Anopheles melas(28.8%), and Anopheles coluzzii(2.1%). The overall human-biting rate of An. gambiaes.l. was highest in the inland site of Keur Martin with 4.92 bites per person per night, while it was similar in the deltaic site, Diofior (0.51) and the coastal site, Mbine Coly (0.67). Parity rates were similar in An. arabiensis(45%) and An. melas(42%). Sporozoite infections were detected in both An. arabiensisand An. melaswith the respective infection rates of 1.39% (N= 8) and 0.41% (N= 1). Results suggest that low residual malaria in central Senegal is transmitted by An. arabiensisand An. melas. Consequently, both vectors will need to be targeted as part of malaria elimination efforts in this area of Senegal.
Titel: |
Residual malaria transmission and the role of Anopheles arabiensisand Anopheles melasin central Senegal
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Autor/in / Beteiligte Person: | Sy, Ousmane ; Sarr, Pape C ; Assogba, Benoit S ; Nourdine, Mouhamed A ; Ndiaye, Assane ; Konaté, Lassana ; Faye, Ousmane ; Donnelly, Martin J ; Gaye, Oumar ; Weetman, David ; Niang, Elhadji A |
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Zeitschrift: | Journal of Medical Entomology, Jg. 60 (2023-05-01), Heft 3, S. 546-553 |
Veröffentlichung: | 2023 |
Medientyp: | serialPeriodical |
ISSN: | 0022-2585 (print) ; 1938-2928 (print) |
DOI: | 10.1093/jme/tjad020 |
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