Cited by 81Malaria Research and ControlInsect Resistance and GeneticsVector-borne infectious diseases

Distribution of ace-1 R and resistance to carbamates and organophosphates in Anopheles gambiae s.s. populations from Côte d'Ivoire

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Ahoua Alou, Ludovic P, Koffi, Alphonsine A, Adja, Maurice A, Tia, Emmanuel, Kouassi, Philippe K, Koné, Moussa, Chandre, Fabrice·2010·Malaria Journal

Abstract

Background: The spread of pyrethroid resistance in Anopheles gambiae s.s. is a critical issue for malaria vector control based on the use of insecticide-treated nets. Carbamates and organophosphates insecticides are regarded as alternatives or supplements to pyrethroids used in nets treatment. It is, therefore, essential to investigate on the susceptibility of pyrethroid resistant populations of An. gambiae s.s. to these alternative products. Methods: In September 2004, a cross sectional survey was conducted in six localities in Côte d'Ivoire: Toumbokro, Yamoussoukro, Toumodi in the Southern Guinea savannah, Tiassalé in semi-deciduous forest, then Nieky and Abidjan in evergreen forest area. An. gambiae populations from these localities were previously reported to be highly resistant to pyrethroids insecticides. Anopheline larvae were collected from the field and reared to adults. Resistance/susceptibility to carbamates (0.4% carbosulfan, 0.1% propoxur) and organophosphates (0.4% chlorpyrifos-methyl, 1% fenitrothion) was assessed using WHO bioassay test kits for adult mosquitoes. Then, PCR assays were run to determine the molecular forms (M) and (S), as well as phenotypes for insensitive acetylcholinesterase (AChE1) due to G119S mutation. Results: Bioassays showed carbamates (carbosulfan and propoxur) resistance in all tested populations of An. gambiae s.s. In addition, two out of the six tested populations (Toumodi and Tiassalé) were also resistant to organophosphates (mortality rates ranged from 29.5% to 93.3%). The M-form was predominant in tested samples (91.8%). M and S molecular forms were sympatric at two localities but no M/S hybrids were detected. The highest proportion of S-form (7.9% of An. gambiae identified) was in sample from Toumbokro, in the southern Guinea savannah. The G119S mutation was found in both M and S molecular forms with frequency from 30.9 to 35.2%. Conclusion: This study revealed a wide distribution of insensitive acetylcholinesterase due to the G119S mutation in both M and S molecular forms of the populations of An. gambiae s.s. tested. The low cross-resistance between carbamates and organophosphates highly suggests involvement of other resistance mechanisms such as metabolic detoxification or F290V mutation.

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  • Agricultural use of pesticides and public health and domestic use of insecticides contribute to the selection and spread of resistance mechanisms in malaria vector populations in Côte d'Ivoire.

    “It was shown that agricultural use of pesticides and public health and domestic use of insecticide contribute to the selection and spread of resistance mechanisms in malaria vector populations in Côte d’Ivoire.”

    From Mapping insecticide resistance in Anopheles gambiae (s.l.) from Côte d'Ivoire (2018) · cites this paper as [23]

    The Discussion (page unavailable) reports that carbosulfan resistance near Bouaké was attributed to agricultural, domestic-hygiene or public-health use of carbamates. It also discusses the wide distribution of ace-1R, but does not establish that all three uses contribute to the selection and spread of resistance mechanisms across Côte d’Ivoire; the cited uses are presented as possible explanations for resistance in one area. (LLM, conf=0.84)

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Research works printed but not linked: 2

  1. Chandre F Darriet F Manga L Akogbeto M Faye O Mouchet J Guillet P Status of pyrethroid resistance in Anopheles gambiae s.l. Bull World Health Organ 1999 77 230 234 10212513 PMC2557627
  2. Scott J Brogdon W Collins F Identification of single specimens of the Anopheles gambiae complex by PCR Am J Trop Med Hyg 1993 49 520 529 8214283

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Authors
Ahoua Alou, L. P., Koffi, A. A., Adja, M. A., Tia, E., Kouassi, P. K., Koné, M., & Chandre, F.
Affiliations
  • Université Félix Houphouët-Boigny (CI)
  • Université Alassane Ouattara (CI)
  • Institut de Recherche pour le Développement (FR)
Corresponding author
Koffi, Alphonsine A
Venue
Malaria Journal
Published
2010-06-16
Volume
9
Issue
1
Pages
167-167
ISSN
1475-2875 (ISSN-L)
OpenAlex
W1985288268
Cited by
81
References
42
Citations by year
2026: 3 · 2025: 6 · 2024: 4 · 2023: 2 · 2022: 2 · 2021: 4 · 2020: 6 · 2019: 3 · 2018: 4 · 2017: 5 · 2016: 6 · 2015: 7 · 2014: 10 · 2013: 7 · 2012: 7
FWCI
6.04
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Malaria Journal (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • Greater South Information System
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Malaria Research and Control
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Insect Resistance and Genetics
  • Life Sciences › Immunology and Microbiology › Parasitology › Vector-borne infectious diseases
Keywords
Anopheles gambiae, carbamate resistance, organophosphate resistance, carbosulfan, propoxur, chlorpyrifos-methyl, fenitrothion, insecticide resistance, malaria vector control, insecticide-treated nets, Côte d'Ivoire
MeSH terms
Acetylcholinesterase, Animals, Anopheles, Base Sequence, Biological Assay, Carbamates, Insecticide Resistance, Insecticides, Cote d'Ivoire, Molecular Sequence Data, Mosquito Control, Phenotype, Organophosphates, Pyrethrins, Polymerase Chain Reaction, Point Mutation, Microsatellite Repeats

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