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indoor residual spraying

COVID-19 and the impact on malaria

June 2, 2020 - 09:36 -- Open Access
Author(s): 
Chiodini J
Reference: 
Travel Med Infect Dis. 2020 May 29:101758

As COVID -19 continues to dominate the health and political agendas in so many countries around the world, so does its devastating impact on other diseases become apparent. Malaria is just one of these.

Indoor residual spraying for malaria control in sub-Saharan Africa 1997 to 2017: an adjusted retrospective analysis

April 13, 2020 - 15:24 -- Open Access
Author(s): 
Julie-Anne A. Tangena, Chantal M. J. Hendriks, Catherine L. Moyes, et al.
Reference: 
Malaria Journal 2020 19:150, 10 April 2020

Indoor residual spraying (IRS) is a key tool for controlling and eliminating malaria by targeting vectors. To support the development of effective intervention strategies it is important to understand the impact of vector control tools on malaria incidence and on the spread of insecticide resistance. In 2006, the World Health Organization (WHO) stated that countries should report on coverage and impact of IRS, yet IRS coverage data are still sparse and unspecific. Here, the subnational coverage of IRS across sub-Saharan Africa for the four main insecticide classes from 1997 to 2017 were estimated.

An exploratory study of the acceptability of indoor residual spraying for malaria control in upper western Ghana

April 10, 2020 - 16:46 -- Open Access
Author(s): 
Suuron VM, Mwanri L, Tsourtos G, Owusu-Addo E
Reference: 
BMC Public Health. 2020 Apr 6;20(1):465

Despite the implementation of the World Health Organisation’s recommended indoor residual spraying (IRS) intervention in the upper west region of Ghana to reduce malaria morbidity and mortality, the uptake of this intervention remains low. This study explores the facilitators and barriers to the acceptability and community uptake of indoor residual spraying in a highly endemic region of Ghana.

Impact of indoor residual spraying with pirimiphos-methyl (Actellic 300CS) on entomological indicators of transmission and malaria case burden in Migori County, western Kenya

March 17, 2020 - 16:44 -- Open Access
Author(s): 
Abong'o B, Gimnig JE, Oxborough RM, et al.
Reference: 
Sci Rep. 2020 Mar 11;10(1):4518

Indoor residual spraying (IRS) of insecticides is a major vector control strategy for malaria prevention. We evaluated the impact of a single round of IRS with the organophosphate, pirimiphos-methyl (Actellic 300CS), on entomological and parasitological parameters of malaria in Migori County, western Kenya in 2017, in an area where primary vectors are resistant to pyrethroids but susceptible to the IRS compound. Entomological monitoring was conducted by indoor CDC light trap, pyrethrum spray catches (PSC) and human landing collection (HLC) before and after IRS. The residual effect of the insecticide was assessed monthly by exposing susceptible An. gambiae s.s.

Lessons learned, challenges and outlooks for decision-making after a decade of experience monitoring the impact of indoor residual spraying in Benin, West Africa

February 3, 2020 - 16:31 -- Open Access
Author(s): 
Martin C. Akogbéto, Fortuné Dagnon, Germain G. Padonou, et al.
Reference: 
Malaria Journal 2020 19:45, 28 January 2020

Since 2008, Indoor Residual Spraying (IRS) has been performed in Benin in 19 districts, including 4 in southern Benin, 9 in Atacora, and 8 in Atacora, Alibori and Donga in northern Benin. However, Benin still struggles with questions about IRS cost–benefit and epidemiological impact. Lessons learned and challenges from 10 years of IRS in Benin to be shared with the stakeholders involved in vector control implementation for decision-making.

Improving the performance of spray operators through monitoring and evaluation of insecticide concentrations of pirimiphos-methyl during indoor residual spraying for malaria control on Bioko Island

January 24, 2020 - 14:52 -- Open Access
Author(s): 
Godwin Fuseini, Hanafy M. Ismail, Michael E. von Fricken, Thomas A. Weppelmann, Jordan Smith, Rhiannon Agnes Ellis Logan, Folasade Oladepo, Kyle J. Walker, Wonder P. Phiri, Mark J. I. Paine and Guillermo A. García
Reference: 
Malaria Journal 2020 19:35, 21 January 2020

Quality control of indoor residual spraying (IRS) is necessary to ensure that spray operators (SOs) deposit the correct concentration of insecticide on sprayed structures, while also confirming that spray records are not being falsified.

Evaluation of long-lasting indoor residual spraying of deltamethrin 62.5 SC-PE against malaria vectors in India

January 15, 2020 - 14:43 -- Open Access
Author(s): 
Sudhansu Sekhar Sahu, Sonia Thankachy, Smrutidhara Dash, Krishnamoorthy Nallan, Subramanian Swaminathan, Gunasekaran Kasinathan and Jambulingam Purushothaman
Reference: 
Malaria Journal 2020 19:19, 14 January 2020

Deltamethrin 62.5 polymer-enhanced suspension concentrate (SC-PE) is one of the World Health Organization-approved insecticides for indoor residual spraying and was recommended to evaluate its residual activity for determination of appropriate spray cycles in different eco-epidemiologic settings. In the current study, efficacy of deltamethrin 62.5 SC-PE was evaluated against vectors of malaria and its impact on malaria incidence in a Plasmodium falciparum hyper-endemic area in Koraput district, Odisha State, India.

Efficacy of Actellic 300 CS-based indoor residual spraying on key entomological indicators of malaria transmission in Alibori and Donga, two regions of northern Benin

January 14, 2020 - 17:01 -- Open Access
Author(s): 
Salako AS, Dagnon F, Sovi A, Padonou GG, Aïkpon R, Ahogni I, Syme T, Govoétchan R, Sagbohan H, Sominahouin AA, Akinro B, Iyikirenga L, Agossa F, Akogbeto MC
Reference: 
Parasites & Vectors 12, 612 (2019)

The current study shows the results of three years of IRS entomological monitoring (2016, before intervention; 2017 and 2018, after intervention) performed in Alibori and Donga, northern Benin.

Upsurge of malaria transmission after indoor residual spraying withdrawal in Atacora region in Benin, West Africa

January 7, 2020 - 14:52 -- Open Access
Author(s): 
Rock Yves Aïkpon, Gil Padonou, Martin Akogbéto, et al.
Reference: 
Malaria Journal 2020 19:3, 3 January 2020

In Benin, malaria vector control mostly relies on long-lasting, insecticidal-treated bed nets (LLINs) and indoor residual spraying (IRS) operations. From 2011 to 2016, an IRS programme has been implemented in Atacora region. However, in 2017 the programme was withdrawn from two other regions in the northern part of the country, with hopes that gains would be relatively sustained because of the seasonality of malaria transmission. What would be the vulnerability of populations to malaria after the withdrawal of IRS?

Effects of indoor residual spraying and outdoor larval control on Anopheles coluzzii from São Tomé and Príncipe, two islands with pre-eliminated malaria

December 10, 2019 - 09:03 -- Open Access
Author(s): 
Chen YA, Lien JC, Tseng LF, Cheng CF, Lin WY, Wang HY, Tsai KH
Reference: 
Malaria Journal, Volume 18, 405 (Dec 5, 2019)

Vector control is a key component of malaria prevention. Two major vector control strategies have been implemented in São Tomé and Príncipe (STP), indoor residual spraying (IRS) and outdoor larval control using Bacillus thuringiensis israelensis (Bti). This study evaluated post-intervention effects of control strategies on vector population density, composition, and knockdown resistance mutation, and their implications for malaria epidemiology in STP.

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