Journal of Bacteriology & Parasitology

Insecticide susceptibility testing of Mansonia uniformis in Trat province, Thailand

5^th International Conference on PARASITOLOGY & MICROBIOLOGY

July 12-13, 2018 Paris, France

Suntorn Pimnon and Adisak Bhumiratana

Mahidol University, Thailand
Bangkokthonburi University, Thailand
CEER- Thammasat University, Thailand

Scientific Tracks Abstracts: J Bacteriol Parasitol

Abstract:

Land transformation such as urban and rural land area, plantations, and agriculture has changed the habitats and invasive mosquito species in a specific location or a wider land area. Based on baseline entomological surveillance data, Mansonia mosquito vectors are among invasive species have been found to be geographically distributed from the habitats in urban area to rural area, in Bo Rai district, Trat province, Thailand. Among Mansonia mosquito vectors observed by entomological surveys, Mansonia uniformis is a predominant species adapted well to local environments. Its insecticide susceptibility to pyrethroids currently used in vector control for dengue and malaria in Bo Rai district, Trat province, has never been documented. The study objective was to test the susceptibility of Mansonia uniformis against the pyrethroids such as deltamethrin (DEL) and bifenthrin (BT). By using human landing catch collections, pooled population samples of night-biting Ma. uniformis were repeatedly collected at a peak hour from 18:00 to 22:00 pm., between August and November 2015. Then, all samples were individually examined for species identification under steromicroscope and subjected to testing susceptibility to DEL and BT insecticides using paired test and control samples. Single dose diagnostics of 0.05% DEL and 0.09% BT was performed with standard testing procedures and exposure times on DELand BT-treated test papers as recommended by WHO. In August, mortality rate of Ma. uniformis was 92.0% for DEL and 98.0% for BT. In November, mortality rate was 92.0% for DEL and 80.3% for BT. No dead Mansonia mosquitoes in untreated control samples was observed throughout the study. Such findings suggested that Ma. uniformis had a tendency of resistance against BT. If there is need for using other synthetic pyrethroids in a wider area of Bo Rai district, it is critical to determine what extent resistance in Ma. uniformis is significant.

Biography :

Suntorn Pimnon has been trained in field of entomology at Laborotoire d’Immuno-Physiopathologie Virale-Maladies Virales Emergentes, Faculty of Pharmacy, Montpellier University (IRD), France. He is at the Faculty of Public health, Bangkokthonburi University, Thailand. He has published more than 5 papers.

E-mail: suntorn.pim@mahidol.ac.th