Tingkat Kerentanan Aedes aegypti (Linn.) terhadap Malation di Provinsi Sumatera Selatan

Lasbudi P. Ambarita, Yulian Taviv, Anif Budiyanto, Hotnida Sitorus, R. Irpan Pahlepi, Febriyanto Febriyanto

Abstract


Abstract
Dengue vector control program in Indonesia and also South Sumatera Province has been using malathion quite long enough. The extensive use of chemical in dengue vector control can lead to development of resistance. This study aims to determine the susceptibility of Aedes aegypti against malathion in 11 district of South Sumatera Province. Larva or pupae were collected with entomology survey kit and colonized until first generation (F1) that were used for bioassay. This test was conducted according to WHO adult susceptibility bioassay procedure.Twenty five blood-fed mosquitoes were exposed to insecticide impregnated paper in each of 4 WHO test kits and 1 control tube. Aedes aegypti from all study sites were still susceptible to operational dose of malathion (5%)
after 1 hour exposure. The estimated resistance ratio (ERR) of knockdown time (KT) to operasional dose of malathion is about 1,02 – 1,27 for KT50 and 0,96 – 1,24 for KT95. The susceptibility test of adult mosquitoes to diagnostic dose (0,8%) of malathion showed a variety of susceptibility after 24 hours. Strain of 7 districts showed resistance, 3 districts toleran and 1 district still susceptible. The detection of resistance can actually help public health personnel to formulate appropriate steps in encountering the reduction in effectiveness of vector control efforts.

Keywords : Aedes aegypti, Malathion, Susceptibility, South Sumatera

Abstrak
Program pengendalian vektor DBD di Indonesia termasuk di Provinsi Sumatera Selatan telah cukup lama menggunakan malation dengan konsentrasi 5%. Penggunaan satu jenis insektisida kimiawi secara ekstensif dapat memicu perkembangan resistensi. Penelitian ini bertujuan untuk menentukan status kerentanan Aedes aegypti terhadap malation dari 11 kabupaten/kota di Provinsi Sumatera Selatan. Larva atau pupa dikumpulkan menggunakan alat survei entomologi dan selanjutnya
dipelihara hingga mendapatkan generasi pertama (F1) yang akan digunakan pada uji kerentanan. Uji kerentanan mengacu kepada metode baku yang ditetapkan WHO. Sebanyak 25 ekor nyamuk dipaparkan terhadap insektisida pada 4 tabung uji dan 1 tabung kontrol. Strain Aedes aegypti yang berasal dari seluruh lokasi sampling menunjukkan masih rentan terhadap malation dosis 5% setelah paparan selama 1 jam. Angka estimated resistance ratio (ERR) dari knockdown time (KT) terhadap dosis operasional berkisar 1,02-1,27 untuk KT50 dan 0,96-1,24 untuk KT95. Uji kerentanan terhadap dosis diagnostik (0,8%) menunjukkan keragaman kerentanan setelah paparan selama 24 jam. Strain dari 7 kab/kota telah resisten, 3 kab/kota berstatus toleran dan 1 kabupaten masih rentan. Deteksi resistensi dapat menjadi acuan untuk menentukan tindakan yang efektif dalam mengatasi menurunnya efektivitas pengendalian vektor.

Kata kunci : Aedes aegypti, Malation, Kerentanan, Sumatera Selatan


Keywords


Aedes aegypti, Malation, Kerentanan, Sumatera Selatan

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Buletin Penelitian Kesehatan (Bulletin of Health Research, p-ISSN: 0125-9695. e-ISSN: 2338-3453) is published by Badan Penelitian dan Pengembangan Kesehatan, Ministry of Health of Republic of Indonesia
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