Measuring entomological parameters before implementing a study on asymptomatic carriers of Plasmodium falciparum in the Zè District in southern Benin
Abstract Background The objective of this study was to estimate malaria transmission and insecticide resistance status in malaria vectors in Adjrako village from Zè District in Southern Benin. The present study was carried out prior to investigations on infectivity of blood from asymptomatic carrier...
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ftdoajarticles:oai:doaj.org/article:c71e47e83818475da99350bfcb645f5e 2023-05-15T15:15:28+02:00 Measuring entomological parameters before implementing a study on asymptomatic carriers of Plasmodium falciparum in the Zè District in southern Benin Aziz Bouraima Armel Djènontin Yannelle Dossou Lenucthadius Houessou Christophe Soares Montchédé Anato Boris-Enock Zinsou Célia Dechavanne Jerome Clain Achille Massougbodji Gilles Cottrell 2023-01-01T00:00:00Z https://doi.org/10.1186/s12936-023-04450-4 https://doaj.org/article/c71e47e83818475da99350bfcb645f5e EN eng BMC https://doi.org/10.1186/s12936-023-04450-4 https://doaj.org/toc/1475-2875 doi:10.1186/s12936-023-04450-4 1475-2875 https://doaj.org/article/c71e47e83818475da99350bfcb645f5e Malaria Journal, Vol 22, Iss 1, Pp 1-11 (2023) Malaria Transmission Zè District Anopheles gambiae Insecticide resistance Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 article 2023 ftdoajarticles https://doi.org/10.1186/s12936-023-04450-4 2023-01-29T01:31:31Z Abstract Background The objective of this study was to estimate malaria transmission and insecticide resistance status in malaria vectors in Adjrako village from Zè District in Southern Benin. The present study was carried out prior to investigations on infectivity of blood from asymptomatic carriers of Plasmodium falciparum to malaria vector mosquitoes. Methods Human landing collections (HLCs) were performed in Adjrako village during the rainy season (September—November 2021). In this village, host-seeking mosquitoes were collected during three nights per survey from 22:00 to 06:00 in six randomly selected houses. Malaria vectors were dissected in orders to determinate their parity. Plasmodium falciparum infection in malaria vectors was determined by qPCR and the entomological inoculation rate (EIR) was calculated. The World Health Organization (WHO) insecticide susceptibility test-kits were used to evaluate the susceptibility of Anopheles gambiae sensu lato (s.l.) to deltamethrin at 0.05% and bendiocarb at 0.1%. Results A total of 3260 females of mosquitoes belonging to 4 genera (Anopheles, Culex, Aedes and Mansonia) were collected. Most of the mosquitoes collected were An. gambiae sensu lato (s.l.). The entomological inoculation rate (EIR) for the three collection months was 8.7 infective bites per person and the parity rate was 84%. Mortality rates of An. gambiae s.l. exposed to 0.05% deltamethrin and 0.1% bendiocarb were 18% and 96%, respectively, indicating that this vector population was resistant to deltamethrin and possibly resistant to bendiocarb in the study area. Conclusion This study showed that malaria transmission is effective in the study area and that An. gambiae s.l. is the main malaria vector. The entomological parameters indicate this study area is potentially favourable for investigations on P. falciparum asymptomatic carriers. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Malaria Journal 22 1 |
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ftdoajarticles |
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English |
topic |
Malaria Transmission Zè District Anopheles gambiae Insecticide resistance Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
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Malaria Transmission Zè District Anopheles gambiae Insecticide resistance Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 Aziz Bouraima Armel Djènontin Yannelle Dossou Lenucthadius Houessou Christophe Soares Montchédé Anato Boris-Enock Zinsou Célia Dechavanne Jerome Clain Achille Massougbodji Gilles Cottrell Measuring entomological parameters before implementing a study on asymptomatic carriers of Plasmodium falciparum in the Zè District in southern Benin |
topic_facet |
Malaria Transmission Zè District Anopheles gambiae Insecticide resistance Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
description |
Abstract Background The objective of this study was to estimate malaria transmission and insecticide resistance status in malaria vectors in Adjrako village from Zè District in Southern Benin. The present study was carried out prior to investigations on infectivity of blood from asymptomatic carriers of Plasmodium falciparum to malaria vector mosquitoes. Methods Human landing collections (HLCs) were performed in Adjrako village during the rainy season (September—November 2021). In this village, host-seeking mosquitoes were collected during three nights per survey from 22:00 to 06:00 in six randomly selected houses. Malaria vectors were dissected in orders to determinate their parity. Plasmodium falciparum infection in malaria vectors was determined by qPCR and the entomological inoculation rate (EIR) was calculated. The World Health Organization (WHO) insecticide susceptibility test-kits were used to evaluate the susceptibility of Anopheles gambiae sensu lato (s.l.) to deltamethrin at 0.05% and bendiocarb at 0.1%. Results A total of 3260 females of mosquitoes belonging to 4 genera (Anopheles, Culex, Aedes and Mansonia) were collected. Most of the mosquitoes collected were An. gambiae sensu lato (s.l.). The entomological inoculation rate (EIR) for the three collection months was 8.7 infective bites per person and the parity rate was 84%. Mortality rates of An. gambiae s.l. exposed to 0.05% deltamethrin and 0.1% bendiocarb were 18% and 96%, respectively, indicating that this vector population was resistant to deltamethrin and possibly resistant to bendiocarb in the study area. Conclusion This study showed that malaria transmission is effective in the study area and that An. gambiae s.l. is the main malaria vector. The entomological parameters indicate this study area is potentially favourable for investigations on P. falciparum asymptomatic carriers. |
format |
Article in Journal/Newspaper |
author |
Aziz Bouraima Armel Djènontin Yannelle Dossou Lenucthadius Houessou Christophe Soares Montchédé Anato Boris-Enock Zinsou Célia Dechavanne Jerome Clain Achille Massougbodji Gilles Cottrell |
author_facet |
Aziz Bouraima Armel Djènontin Yannelle Dossou Lenucthadius Houessou Christophe Soares Montchédé Anato Boris-Enock Zinsou Célia Dechavanne Jerome Clain Achille Massougbodji Gilles Cottrell |
author_sort |
Aziz Bouraima |
title |
Measuring entomological parameters before implementing a study on asymptomatic carriers of Plasmodium falciparum in the Zè District in southern Benin |
title_short |
Measuring entomological parameters before implementing a study on asymptomatic carriers of Plasmodium falciparum in the Zè District in southern Benin |
title_full |
Measuring entomological parameters before implementing a study on asymptomatic carriers of Plasmodium falciparum in the Zè District in southern Benin |
title_fullStr |
Measuring entomological parameters before implementing a study on asymptomatic carriers of Plasmodium falciparum in the Zè District in southern Benin |
title_full_unstemmed |
Measuring entomological parameters before implementing a study on asymptomatic carriers of Plasmodium falciparum in the Zè District in southern Benin |
title_sort |
measuring entomological parameters before implementing a study on asymptomatic carriers of plasmodium falciparum in the zè district in southern benin |
publisher |
BMC |
publishDate |
2023 |
url |
https://doi.org/10.1186/s12936-023-04450-4 https://doaj.org/article/c71e47e83818475da99350bfcb645f5e |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Malaria Journal, Vol 22, Iss 1, Pp 1-11 (2023) |
op_relation |
https://doi.org/10.1186/s12936-023-04450-4 https://doaj.org/toc/1475-2875 doi:10.1186/s12936-023-04450-4 1475-2875 https://doaj.org/article/c71e47e83818475da99350bfcb645f5e |
op_doi |
https://doi.org/10.1186/s12936-023-04450-4 |
container_title |
Malaria Journal |
container_volume |
22 |
container_issue |
1 |
_version_ |
1766345844198473728 |