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indoor residual spraying

An observational analysis of the impact of indoor residual spraying in Northern, Upper East, and Upper West Regions of Ghana: 2014 through 2017

July 14, 2020 - 09:22 -- Open Access
Author(s): 
Christelle Gogue, Joseph Wagman, Molly Robertson, et al.
Reference: 
Malaria Journal 2020 19:242, 11 July 2020

Ghana has been implementing the indoor residual spraying (IRS) of insecticides since 2006, focusing operations in the north. Insecticide resistance concerns prompted a switch from pyrethroids to organophosphates, beginning gradually in 2011 and switching fully to the micro-encapsulated formulation of pirimiphosmethyl (PM CS), Actellic® 300CS, a third-generation indoor residual spraying (3GIRS) product, by 2014. Entomological surveillance studies have shown IRS to be a highly effective malaria control tool, but epidemiological evidence is needed as well. Countrywide prevalence surveys have shown that malaria parasite prevalence in children under 5 years of age in Northern, Upper East, and Upper West Regions had declined to less than 40% in each region by 2016. Similarly, malaria deaths in children under 5 years of age have also been declining nationally since 2009. Although IRS is suspected to have contributed to this decline, stronger evidence is needed to link the IRS interventions to the epidemiological impact.

NOT Open Access | Insecticide resistance and malaria control: A genetics-epidemiology modeling approach

July 13, 2020 - 15:49 -- NOT Open Access
Author(s): 
Mohammed-Awel J, Iboi EA, Gumel AB
Reference: 
Math Biosci. 2020 Jul;325:108368

Malaria, a deadly infectious disease caused by the protozoan Plasmodium, remains a major public health menace affecting at least half the human race. Although the large-scale usage of insecticides-based control measures, notably long-lasting insecticidal nets (LLINs) and indoor residual spraying (IRS), have led to a dramatic reduction of the burden of this global scourge between the period 2000 to 2015, the fact that the malaria vector (adult female Anopheles mosquito) has become resistant to all currently-available insecticides potentially makes the current laudable global effort to eradicate malaria by 2040 more challenging.

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.

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