Original Article

Insecticide Susceptibility Status of Wild Population of Phlebotomus kandelakii and Phlebotomus perfiliewi transcaucasicus Collected from Visceral Leishmaniasis Endemic Foci in Northwestern Iran


Background: Phlebotomus kandelakii and Phlebotomus perfiliewi transcaucasicus sand flies are the vectors of vis­ceral leishmaniasis in Iran. The aim of this study was to evaluate the susceptibility of Ph. kandelakii and Ph. perfil­iewi trans­caucasicus, collected from an endemic focus of visceral leishmaniasis (VL) in the northwest of Iran, to different select­ed insecticides.Methods: Sand flies were collected from the villages of Meshkinshahr and Germi Counties using light traps and aspira­tors from May to October 2019. The sand flies were identified as Ph. kandelakii and Ph. perfiliewi transcauca­sicus us­ing standard identification keys. Susceptibility test was carried out against DDT (4%), Malathion (5%), Propoxur (0.1%) and Lambda-cyhalothrin (0.05%) according to the WHO standard method. MedCalc statistical software was employed to calculate LT50 and LT90 and to compare the chances of sand flies surviving the exposure to the studied in­secticides.Results: A total of 1,278 female specimens were used for the susceptibility tests. Out of which 1,063 samples were used for the test and 215 for the control group. The estimated LT50 values for DDT (4%), Malathion (5%), Propoxur (0.1%), and Lambda-cyhalothrin (0.05%) for Ph. kandelakii were 15.1, 13.4, 15.4 and 5.8 minutes respectively, and for Ph. per­filiewi transcaucasicus were 11.9, 15.6, 15.9 and 5.8 minutes  respectively.Conclusion: This susceptibility studies revealed different LT50 values for different insecticides efficient against Ph. kandelakii and Ph. perfiliewi transcaucasicus. The regular monitoring for the resistance of Ph. kandelakii and Ph. per­filiewi transcaucasicus sand flies seems necessary in diseases control programs in this area.
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IssueVol 14 No 3 (2020) QRcode
SectionOriginal Article
DOI https://doi.org/10.18502/jad.v14i3.4561
Phlebotomus kandelakii Phlebotomus perfiliewi transcaucasicus Insecticide resistance Insecticide sus¬ceptibility Lambda-cyhalothrin

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Rassi Y, Moradi-Asl E, Vatandoost H, Abazari M, Saghafipour A. Insecticide Susceptibility Status of Wild Population of Phlebotomus kandelakii and Phlebotomus perfiliewi transcaucasicus Collected from Visceral Leishmaniasis Endemic Foci in Northwestern Iran. J Arthropod Borne Dis. 14(3):277–285.