Combining next-generation indoor residual spraying and drug-based malaria control strategies: observational evidence of a combined effect in Mali
Abstract Background Ségou Region in central Mali is an area of high malaria burden with seasonal transmission. The region reports high access to and use of long-lasting insecticidal nets (LLINs), though the principal vector, Anopheles gambiae, is resistant to pyrethroids. From 2011 until 2016, sever...
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ftdoajarticles:oai:doaj.org/article:3ffe6f40beeb4b03922535e400a5fc93 2023-05-15T15:17:27+02:00 Combining next-generation indoor residual spraying and drug-based malaria control strategies: observational evidence of a combined effect in Mali Joseph Wagman Idrissa Cissé Diakalkia Kone Seydou Fomba Erin Eckert Jules Mihigo Elie Bankineza Mamadou Bah Diadier Diallo Christelle Gogue Kenzie Tynuv Andrew Saibu Jason H. Richardson Christen Fornadel Laurence Slutsker Molly Robertson 2020-08-01T00:00:00Z https://doi.org/10.1186/s12936-020-03361-y https://doaj.org/article/3ffe6f40beeb4b03922535e400a5fc93 EN eng BMC http://link.springer.com/article/10.1186/s12936-020-03361-y https://doaj.org/toc/1475-2875 doi:10.1186/s12936-020-03361-y 1475-2875 https://doaj.org/article/3ffe6f40beeb4b03922535e400a5fc93 Malaria Journal, Vol 19, Iss 1, Pp 1-11 (2020) Indoor residual spraying Observational analysis Seasonal malaria chemoprevention Combined malaria control strategies Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 article 2020 ftdoajarticles https://doi.org/10.1186/s12936-020-03361-y 2022-12-31T04:39:19Z Abstract Background Ségou Region in central Mali is an area of high malaria burden with seasonal transmission. The region reports high access to and use of long-lasting insecticidal nets (LLINs), though the principal vector, Anopheles gambiae, is resistant to pyrethroids. From 2011 until 2016, several high-burden districts of Ségou also received indoor residual spraying (IRS), though in 2014 concerns about pyrethroid resistance prompted a shift in IRS products to a micro-encapsulated formulation of the organophosphate insecticide pirimiphos-methyl. Also in 2014, the region expanded a pilot programme to provide seasonal malaria chemoprevention (SMC) to children aged 3–59 months in two districts. The timing of these decisions presented an opportunity to estimate the impact of both interventions, deployed individually and in combination, using quality-assured passive surveillance data. Methods A non-randomized, quasi-experimental time series approach was used to analyse monthly trends in malaria case incidence at the district level. Districts were stratified by intervention status: an SMC district, an IRS district, an IRS + SMC district, and control districts that received neither IRS nor SMC in 2014. The numbers of positive rapid diagnostic test (RDT +) results reported at community health facilities were aggregated and epidemiological curves showing the incidence of RDT-confirmed malaria cases per 10,000 person-months were plotted for the total all-ages and for the under 5 year old (u5) population. The cumulative incidence of RDT + malaria cases observed from September 2014 to February 2015 was calculated in each intervention district and compared to the cumulative incidence reported from the same period in the control districts. Results Cumulative peak-transmission all-ages incidence was lower in each of the intervention districts compared to the control districts: 16% lower in the SMC district; 28% lower in the IRS district; and 39% lower in the IRS + SMC district. The same trends were observed in the u5 ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Malaria Journal 19 1 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Indoor residual spraying Observational analysis Seasonal malaria chemoprevention Combined malaria control strategies Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
spellingShingle |
Indoor residual spraying Observational analysis Seasonal malaria chemoprevention Combined malaria control strategies Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 Joseph Wagman Idrissa Cissé Diakalkia Kone Seydou Fomba Erin Eckert Jules Mihigo Elie Bankineza Mamadou Bah Diadier Diallo Christelle Gogue Kenzie Tynuv Andrew Saibu Jason H. Richardson Christen Fornadel Laurence Slutsker Molly Robertson Combining next-generation indoor residual spraying and drug-based malaria control strategies: observational evidence of a combined effect in Mali |
topic_facet |
Indoor residual spraying Observational analysis Seasonal malaria chemoprevention Combined malaria control strategies Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
description |
Abstract Background Ségou Region in central Mali is an area of high malaria burden with seasonal transmission. The region reports high access to and use of long-lasting insecticidal nets (LLINs), though the principal vector, Anopheles gambiae, is resistant to pyrethroids. From 2011 until 2016, several high-burden districts of Ségou also received indoor residual spraying (IRS), though in 2014 concerns about pyrethroid resistance prompted a shift in IRS products to a micro-encapsulated formulation of the organophosphate insecticide pirimiphos-methyl. Also in 2014, the region expanded a pilot programme to provide seasonal malaria chemoprevention (SMC) to children aged 3–59 months in two districts. The timing of these decisions presented an opportunity to estimate the impact of both interventions, deployed individually and in combination, using quality-assured passive surveillance data. Methods A non-randomized, quasi-experimental time series approach was used to analyse monthly trends in malaria case incidence at the district level. Districts were stratified by intervention status: an SMC district, an IRS district, an IRS + SMC district, and control districts that received neither IRS nor SMC in 2014. The numbers of positive rapid diagnostic test (RDT +) results reported at community health facilities were aggregated and epidemiological curves showing the incidence of RDT-confirmed malaria cases per 10,000 person-months were plotted for the total all-ages and for the under 5 year old (u5) population. The cumulative incidence of RDT + malaria cases observed from September 2014 to February 2015 was calculated in each intervention district and compared to the cumulative incidence reported from the same period in the control districts. Results Cumulative peak-transmission all-ages incidence was lower in each of the intervention districts compared to the control districts: 16% lower in the SMC district; 28% lower in the IRS district; and 39% lower in the IRS + SMC district. The same trends were observed in the u5 ... |
format |
Article in Journal/Newspaper |
author |
Joseph Wagman Idrissa Cissé Diakalkia Kone Seydou Fomba Erin Eckert Jules Mihigo Elie Bankineza Mamadou Bah Diadier Diallo Christelle Gogue Kenzie Tynuv Andrew Saibu Jason H. Richardson Christen Fornadel Laurence Slutsker Molly Robertson |
author_facet |
Joseph Wagman Idrissa Cissé Diakalkia Kone Seydou Fomba Erin Eckert Jules Mihigo Elie Bankineza Mamadou Bah Diadier Diallo Christelle Gogue Kenzie Tynuv Andrew Saibu Jason H. Richardson Christen Fornadel Laurence Slutsker Molly Robertson |
author_sort |
Joseph Wagman |
title |
Combining next-generation indoor residual spraying and drug-based malaria control strategies: observational evidence of a combined effect in Mali |
title_short |
Combining next-generation indoor residual spraying and drug-based malaria control strategies: observational evidence of a combined effect in Mali |
title_full |
Combining next-generation indoor residual spraying and drug-based malaria control strategies: observational evidence of a combined effect in Mali |
title_fullStr |
Combining next-generation indoor residual spraying and drug-based malaria control strategies: observational evidence of a combined effect in Mali |
title_full_unstemmed |
Combining next-generation indoor residual spraying and drug-based malaria control strategies: observational evidence of a combined effect in Mali |
title_sort |
combining next-generation indoor residual spraying and drug-based malaria control strategies: observational evidence of a combined effect in mali |
publisher |
BMC |
publishDate |
2020 |
url |
https://doi.org/10.1186/s12936-020-03361-y https://doaj.org/article/3ffe6f40beeb4b03922535e400a5fc93 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Malaria Journal, Vol 19, Iss 1, Pp 1-11 (2020) |
op_relation |
http://link.springer.com/article/10.1186/s12936-020-03361-y https://doaj.org/toc/1475-2875 doi:10.1186/s12936-020-03361-y 1475-2875 https://doaj.org/article/3ffe6f40beeb4b03922535e400a5fc93 |
op_doi |
https://doi.org/10.1186/s12936-020-03361-y |
container_title |
Malaria Journal |
container_volume |
19 |
container_issue |
1 |
_version_ |
1766347695258075136 |