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insecticide resistance

Characterizing the molecular and metabolic mechanisms of insecticide resistance in Anopheles gambiae in Faranah, Guinea

July 21, 2019 - 21:48 -- Open Access
Author(s): 
Caleb Stica, Claire L. Jeffries, Seth R. Irish, Yaya Barry, Denka Camara, Ismael Yansane, Mojca Kristan, Thomas Walker and Louisa A. Messenger
Reference: 
Malaria Journal 2019 18:244, 17 July 2019

In recent years, the scale-up of long-lasting insecticidal nets (LLINs) and indoor residual spraying (IRS) has greatly reduced malaria transmission. However, malaria remains a global public health concern with the majority of the disease burden in sub-Saharan Africa. Insecticide resistance is a growing problem among Anopheles vector populations, with potential implications for the continued effectiveness of available control interventions. Improved understanding of current resistance levels and underlying mechanisms is essential to design appropriate management strategies and to mitigate future selection for resistance.

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When a discriminating dose assay is not enough: measuring the intensity of insecticide resistance in malaria vectors

May 22, 2015 - 13:00 -- Open Access
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Author(s): 
Judit Bagi, Nelson Grisales, Rebecca Corkill, John C Morgan, Sagnon N'Falé, William G Brogdon, Hilary Ranson
Reference: 
Malaria Journal 2015, 14:210 (20 May 2015)

Incorporating quantitative measures of resistance strength, and utilizing bioassays with field doses of insecticides, will help interpret the possible impact of resistance on vector control activities.

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Efficacy of ICON(R) Maxx in the laboratory and against insecticide-resistant Anopheles gambiae in central Cote d'Ivoire

May 17, 2012 - 06:32 -- Kabogo Ndegwa
Author(s): 
Winkler MS, Tchicaya E, Koudou BG, Donze J, Nsanzabana C, Muller P, Adja AM, Utzinger J
Reference: 
Malaria Journal 2012, 11:167 (15 May 2012)

MalariaWorldIn contrast to previous laboratory investigation, ICON(R) Maxx-treated nets showed only moderate KD and mortality rates.

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Open Access | Efficacy of PermaNet(R) 2.0 and PermaNet(R) 3.0 against insecticide-resistant Anopheles gambiae in experimental huts in Cote d'Ivoire

June 28, 2011 - 06:52 -- Kabogo Ndegwa
Author(s): 
Koudou BG, Koffi AA, Malone D, Hemingway J
Reference: 
Malaria Journal 2011, 10:172 (23 June 2011)

This study showed that unwashed PermaNet(R) 3.0 caused significantly higher mortality against pyrethroid resistant An. gambiae s.s and Culex spp than PermaNet(R) 2.0 and the CTN.

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Open Access | Staggered larval time-to-hatch and insecticide resistance in the major malaria vector Anopheles gambiae S form

December 16, 2010 - 08:57 -- Kabogo Ndegwa
Author(s): 
Kaiser ML, Koekemoer LL, Coetzee M, Hunt RH, Brooke BD
Reference: 
Malaria Journal 2010, 9:360 (14 December 2010)

An adaptive response to the presence of multiple insecticide classes necessarily involves the development of multiple resistance mechanisms whose effectiveness may be enhanced by intra-population variation in the expression of resistance phenotypes.

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Open Access | Malaria transmission and insecticide resistance of Anopheles gambiae s.l. in Libreville and Port-Gentil, Gabon

November 17, 2010 - 12:47 -- Kabogo Ndegwa
Author(s): 
Jean-Romain Mourou, Thierry Coffinet, Fanny Jarjaval, Bruno Pradines, Remi Amalvict, Christophe Rogier, Maryvonne Kombila, Frederic Pages
Reference: 
Malaria Journal 2010, 9:321 (11 November 2010)

Malaria transmission exists in both town, but with high difference in the level of risk.

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Open Access | Insecticide resistance in Anopheles arabiensis (Diptera: Culicidae) from villages in central, northern and south west Ethiopia and detection of kdr mutation

April 29, 2010 - 14:10 -- Kabogo Ndegwa
Author(s): 
M Balkew, M Ibrahim, LL Koekemoer, BD Brooke, H Engers, A Aseffa, T Gebre-Michael, I Elhassen
Reference: 
Parasites & Vectors 2010, 3:40 25 April 2010

Since An. arabiensis shows high levels of resistance to DDT in all villages tested and varying pyrethroid resistance in Gorgora and the Ghibe River valley, precautionary measures should be taken in future vector control operations. Moreover, the status of resistance in other locations in Ethiopia and the spread of resistant gene (s) should be investigated.

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Field, Genetic, and Modeling Approaches Show Strong Positive Selection Acting upon an Insecticide Resistance Mutation in Anopheles gambiae s.s

April 28, 2010 - 12:13 -- Patrick Sampao
Author(s): 
Amy Lynd, David Weetman, Susana Barbosa, Alexander Egyir Yawson, Sara Mitchell, Joao Pinto, Ian Hastings and Martin J. Donnelly
Reference: 
Molecular Biology and Evolution 2010 27(5):1117-1125

In this study, we employ haplotype diversity analysis to examine evidence for selective sweeps around knockdown resistance (kdr) mutations associated with resistance to dichlorodiphenyltrichloroethane and pyrethroid insecticides in the mosquito Anopheles gambiae.

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Open Access | Insecticide resistance in Anopheles arabiensis (Diptera: Culicidae) from villages in central, northern and south west Ethiopia and detection of kdr mutation

April 27, 2010 - 13:05 -- Patrick Sampao
Author(s): 
Meshesha B., Muntaser I., et al.
Reference: 
Parasites & Vectors 2010, Vol 3 : 4

Standard WHO insecticide susceptibility tests were conducted on adults reared from larval and pupal collections from breeding sites at three villages namely: Sodere in the Rift Valley, Gorgora in the north and Ghibe River Valley in the south west of Ethiopia.

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Field, genetic and modelling approaches show strong positive selection acting upon an insecticide resistance mutation in Anopheles gambiae s.s.

January 10, 2010 - 15:28 -- Ingeborg van Schayk
Author(s): 
Amy Lynd, David Weetman, Susana Barbosa, Alexander Egyir-Yawson, Sara Mitchell, Joao Pinto, Ian Hastings, and Martin J Donnelly
Reference: 
Mol. Biol. Evol. published 7 January 2010

Our data show that strong, recent positive selective events, such as those caused by insecticide resistance, can be identified in wild insect populations.

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