MSPTM 2019 Annual Scientific Conference
13 - 14 March 2019
InterContinental Kuala Lumpur

Abstract

Title

A STATEWIDE EVALUATION OF INSECTICIDE RESISTANCE STATUS OF AEDES ALBOPICTUS IN SABAH, MALAYSIA

Type
E-Poster Presentation Competition for Student
Theme
Scaling Up Efforts in Tropical Disease and Vector Control through Evidence-Based Research
Topic
Insecticide Resistance

Authors

Main Author
Nur Elia Amira Mohd Roslin1
Presenting Author
Nur Elia Amira Mohd Roslin1
Co-Author
Chee Dhang Chen1
Van Lun Low2
Koon Weng Lau1
Amirah Haziqah Rashid1
Amelia Zheng Hua Yap2
Han Lim Lee3
Mohd Sofian Azirun1

Authors' Institution

Department / Institution / Country
Institute of Biological Sciences, Faculty of Science / University of Malaya / Malaysia1
Tropical Infectious Diseases Research and Education Centre (TIDREC) / University of Malaya / Malaysia2
Medical Entomology Unit / Institute for Medical Research / Malaysia3
Content
Abstract Content

A statewide investigation was carried out to determine the current susceptibility status of Aedes albopictus in Sabah, Malaysia against eight WHO recommended doses of insecticides representing the classes of organophosphates and organochlorines. Field collected and reference populations of Ae. albopictus larvae were bioassayed in accordance to the WHO standard methods using diagnostic doses of bromophos (0.05 mg/L), chlorpyrifos (0.012 mg/L), fenitrothion (0.02 mg/L), fenthion (0.025 mg/L), malathion (0.125 mg/L), temephos (0.012 mg/L), DDT (dichlorodiphenyltrichloroethane) (0.012 mg/L) and dieldrin (0.050 mg/L). The results revealed that Ae. albopictus was highly resistant (mortality < 90%) towards malathion, temephos and DDT. In addition, Ae. albopictus also exhibited certain levels of resistance against bromophos, with 13 out of 14 populations showing resistance. Contrastingly, only dieldrin was able to induce 100.00% mortality against all populations of Ae. albopictus. Various resistance patterns, however, were showcased when Ae. albopictus was bioassayed against fenitrothion, fenthion and chlorpyrifos, with mortality ranging from 68.00 to 100.00%. This study has uncovered the inadequateness of some organophosphate and organochlorine insecticides in dengue vector control in Sabah. Accordingly, a baseline reference for future monitoring by local authorities was established.

Keywords: Aedes albopictus; organochlorine; organophosphate; Sabah; Malaysia
Requires Audio or Video system for Presentation?: No