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Susceptibility of malaria vectors to insecticides in Ampara, Batticaloa, Trincomalee & Mannar districts of Sri Lanka

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dc.contributor.author Gunathilaka, P.A.D.H.N. en_US
dc.contributor.author Fernando, M.A.S.T. en_US
dc.contributor.author Hapugoda, M.D. en_US
dc.contributor.author Wijeyerathne, P. en_US
dc.contributor.author Wickremasinghe, A.R. en_US
dc.contributor.author Abeyewickreme, W. en_US
dc.date.accessioned 2015-06-18T04:01:08Z en_US
dc.date.available 2015-06-18T04:01:08Z en_US
dc.date.issued 2012 en_US
dc.identifier.citation Proceedings of the Annual Research Symposium, Faculty of Graduate Studies, University of Kelaniya. 2012; 13: 65. en_US
dc.identifier.uri en_US
dc.identifier.uri http://repository.kln.ac.lk/handle/123456789/8357 en_US
dc.description Poster Presentation Abstract, Annual Research Symposium, FGS, University of Kelaniya, November, 2012, Kelaniya en_US
dc.description.abstract Background: The current status of insecticide resistance was studied for potential malaria vectors in four districts namely Ampara, Batticaloa, Mannar and Trincomalee of Sri Lanka. Methods: Insecticide-susceptibility tests were carried out using WHO standard kits against various chemical compounds at ambient room temperature of 27+1oC and relative humidity of 75-80% for adult and larvae separately. A total of 3629 adult female Anopheles mosquitoes belong to nine species (An. subpictus, An. vagus, An. nigerrimus, An. peditaeniatus, An. pallidus, An. annularis, An. jamesii, An. pseudojamesi and An. barbirostris) were exposed to cyfluthrin- 0.15%, etofenofrox- 0.5%, bendiocarb- 0.01%, malathion – 5%, deltamethrin – 0.05%, permethrin – 0.75%, λ- cyhalothrin– 0.05%, fenitrothion – 1.0% and propoxur – 0.1%. A total of 610 larvae belong to five Anopheles species (An. subpictus, An. vagus, An. barbirostris and An. peditaeniatus) were exposed to 0.0025, 0.005, 0.125 and 0.625 mg/l of viz. temephos (Abate). Results: All of the mosquito larvae or adult species used for the study were susceptible for selected insecticides (Mortality 98-100%). Adult Anopheles species showed a possibility of developing resistance to some chemicals (Mortality 97- 80%): An. nigerrimus (lambdacyhalothrin and permethrin), An. peditaeniatus (malathion, deltamethrin and cyfluthrin) An. subpictus (deltamethrin, permethrin, propoxur, cyfluthrin, and etofenprox), An. vagus (deltamethrin, permethrin and etofenprox) and An. pallidus (deltamethrin). Anopheles larvae of An. subpictus, An. barbirostris and An. peditaeniatus showed the potential of developing resistance (Mortality 97-80%). Interpretation & conclusion: As a result of resettlements and expanding commercial agriculture there can be a potentiality of developing insecticide resistance in mosquito individuals. Therefore, proper use of chemicals as pesticides should be adopted in these areas. en_US
dc.language.iso en en_US
dc.publisher University of Kelaniya en_US
dc.subject.mesh Malaria en_US
dc.subject.mesh Insect Vectors en_US
dc.subject.mesh Insecticides en_US
dc.subject.mesh Insecticides-antagonists & inhibitors en_US
dc.title Susceptibility of malaria vectors to insecticides in Ampara, Batticaloa, Trincomalee & Mannar districts of Sri Lanka en_US
dc.type Conference Abstracts en_US
dc.identifier.department Molecular Medicine Unit en_US
dc.identifier.department Public Health en_US
dc.identifier.department Parasitology en_US


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