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Variation of physical durability between LLIN products and net use environments: summary of findings from four African countries

January 13, 2021 - 08:28 -- Open Access
Albert Kilian, Emmanuel Obi, Paul Mansiangi, Ana Paula Abílio, Khamis Ameir Haji, Sean Blaufuss, Bolanle Olapeju, Stella Babalola and Hannah Koenker
Malaria Journal 2021 20:26, 7 January 2021

Physical durability of long-lasting-insecticidal nets (LLIN) is an important aspect of the effectiveness of LLIN as a malaria prevention tool, but there is limited data on performance across locations and products. This secondary analysis of data from the VectorWorks project from 10 sites in four African countries involving six LLIN brands provides such data.

NOT Open Access | Community Knowledge, Attitude and Practices on Malaria Vector Control Strategies in Lagos State, South-West Nigeria

January 12, 2021 - 15:16 -- NOT Open Access
Omotayo AI, Ande AT, Oduola AO, Olakiigbe AK, Ghazali AK, Adeneye A, Awolola ST
J Med Entomol. 2021 Jan 9:tjaa278

Malaria is a leading public health challenge causing mortality and morbidity in sub-Saharan Africa. Prominent malaria vector control methods employed in sub-Saharan Africa include Long Lasting Insecticide Nets (LLINs) and Indoor Residual spraying (IRS). This study investigated knowledge, attitude and practices (KAP) of malaria vector control methods in Lagos, South-West Nigeria. Structured questionnaires were employed for the cross-sectional survey which was carried out between May and August 2018. Multi-stage sampling technique was used to select Lagos Mainland, Kosofe, and Ojo local government areas (LGAs).

NOT Open Access | Using pastoralist community knowledge to locate and treat dry-season mosquito breeding habitats with pyriproxyfen to control Anopheles gambiae s.l. and Anopheles funestus s.l. in rural Tanzania

January 12, 2021 - 14:35 -- NOT Open Access
Lupenza ET, Kihonda J, Limwagu AJ, Ngowo HS, Sumaye RD, Lwetoijera DW
Parasitol Res. 2021 Jan 6

Fundamentally, larviciding with pyriproxyfen (PPF) has potential to complement Long Lasting Insecticide Nets (LLINs) and indoor residual sprays (IRS) in settings where resistance to pyrethroids and residual malaria transmission exist. In this study, we evaluated the field effectiveness of larviciding using PPF to reduce dry season productivity of mosquito breeding habitats that were located by pastoralists within the study area.

NOT Open Access | Performance of pirimiphos-methyl based Indoor Residual Spraying on entomological parameters of malaria transmission in the pyrethroid resistance region of Koulikoro, Mali

January 6, 2021 - 12:41 -- NOT Open Access
Keïta M, Sogoba N, Traoré B, Kané F, Coulibaly B, Traoré SF, Doumbia S
Acta Trop. 2021 Jan 2:105820

Malaria vector control in Mali relies heavily on the use of long-lasting insecticidal nets (LLINs) and indoor residual spraying (IRS) in selected districts. As part of strengthening vector control strategies in Koulikoro district, the National Malaria Control Programme (NMCP) through the support from the US President's Malaria Initiative (PMI) has strategically driven the implementation of IRS, with the LLINs coverage also rising from 93.3% and 98.2%. Due to the increased reports of vector resistance to both pyrethroid and carbamates, there was a campaign for the use of pirimiphos-methyl, an organophosphate at Koulikoro between 2015 and 2016.

Insights into factors sustaining persistence of high malaria transmission in forested areas of sub-Saharan Africa: the case of Mvoua, South Cameroon

January 5, 2021 - 15:15 -- Open Access
Mieguim Ngninpogni D, Ndo C, Ntonga Akono P, Nguemo A, Nguepi A, Metitsi DR, Tombi J, Awono-Ambene P, Bilong Bilong CF
Parasit Vectors. 2021 Jan 2;14(1):2

In Mvoua, a village situated in a forested area of Cameroon, recent studies have reported high prevalence of Plasmodium falciparum infection among the population. In order to understand factors that can sustain such a high malaria transmission, we investigated the biology of Anopheles vectors and its susceptibility to insecticides, as well as long-lasting insecticidal net (LLIN) coverage, use and bio-efficacy.

Cost-Effectiveness of PBO versus Conventional Long-Lasting Insecticidal Bed Nets in Preventing Symptomatic Malaria in Nigeria: Results of a Pragmatic Randomized Trial

December 23, 2020 - 08:31 -- Open Access
Shepard DS, Odumah JU, Awolola ST
Am J Trop Med Hyg. 2020 Dec 21

Insecticide treated nets (ITNs) have been the major tool in halving malaria's burden since 2000, but pyrethroid insecticide resistance threatens their ongoing effectiveness. In 2017, the WHO concluded that long-lasting ITNs (LLINs) with a synergist, piperonyl butoxide (PBO), provided additional public health benefit over conventional (pyrethroid-only) LLINs alone in areas of moderate insecticide resistance and endorsed them as a new class of vector control products. We performed an economic appraisal of PBO nets compared with conventional LLINs in 2019 US$ from prevention and health systems perspectives (including treatment cost offsets).

Coverage outcomes (effects), costs, cost-effectiveness, and equity of two combinations of long-lasting insecticidal net (LLIN) distribution channels in Kenya: a two-arm study under operational conditions

December 9, 2020 - 07:42 -- Open Access
Worrall E, Were V, Matope A, Gama E, Olewe J, Mwambi D, Desai M, Kariuki S, Buff AM, Niessen LW
BMC Public Health. 2020 Dec 7;20(1):1870

Malaria-endemic countries distribute long-lasting insecticidal nets (LLINs) through combined channels with ambitious, universal coverage (UC) targets. Kenya has used eight channels with variable results. To inform national decision-makers, this two-arm study compares coverage (effects), costs, cost-effectiveness, and equity of two combinations of LLIN distribution channels in Kenya.

Non-adherence to long-lasting insecticide treated bednet use following successful malaria control in Tororo, Uganda

December 8, 2020 - 10:44 -- Open Access
Rek J, Musiime A, Zedi M, Otto G, Kyagamba P, Asiimwe Rwatooro J, Arinaitwe E, Nankabirwa J, Staedke SG, Drakeley C, Rosenthal PJ, Kamya M, Dorsey G, Krezanoski PJ
PLoS One. 2020 Dec 3;15(12):e0243303

Indoor residual spraying (IRS) and long-lasting insecticide-treated bednets (LLINs) are common tools for reducing malaria transmission. We studied a cohort in Uganda with universal access to LLINs after 5 years of sustained IRS to explore LLIN adherence when malaria transmission has been greatly reduced. Eighty households and 526 individuals in Nagongera, Uganda were followed from October 2017 -October 2019. Every two weeks, mosquitoes were collected from sleeping rooms and LLIN adherence the prior night assessed. Episodes of malaria were diagnosed using passive surveillance.

Malaria epidemiology and stratification of incidence in the malaria elimination setting in Harari Region, Eastern Ethiopia

November 25, 2020 - 12:04 -- Open Access
Esayas E, Tufa A, Massebo F, Ahemed A, Ibrahim I, Dillu D, Bogale EA, Yared S, Deribe K
Infect Dis Poverty. 2020 Nov 22;9(1):160

Ethiopia has shown notable progress in reducing the burden of malaria over the past two decades. Because of this progress, the country has shifted efforts from control to elimination of malaria. This study was conducted to analyse the malaria epidemiology and stratification of incidence in the malaria elimination setting in eastern Ethiopia.

Accounting for regional transmission variability and the impact of malaria control interventions in Ghana: a population level mathematical modelling approach

November 24, 2020 - 14:52 -- Open Access
Timothy Awine and Sheetal P. Silal
Malaria Journal 2020 19:423, 23 November 2020

This paper investigates the impact of malaria preventive interventions in Ghana and the prospects of achieving programme goals using mathematical models based on regionally diverse climatic zones of the country.


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