Sains Malaysiana 41(10)(2012): 1309–1313

Distribution of Aedes Mosquitoes in Three Selected Localities in Malaysia

(Taburan Nyamuk Aedes di Tiga Lokaliti Terpilih di Malaysia)

O. Wan-Norafikah*

Faculty of Medicine, Universiti Teknologi MARA (UiTM), Jalan Prima Selayang 7

68100 Batu Caves, Selangor, Malaysia

W.A. Nazni, S. Noramiza, S., Shafa’ar-Ko’ohar, S.K. Heah, A.H., Nor-Azlina,

M. Khairul-Asuad & H.L. Lee

Medical Entomology Unit, Infectious Diseases Research Centre (IDRC),

Institute for Medical Research (IMR), Jalan Pahang, 50588 Kuala Lumpur, Malaysia

Diserahkan: 25 Januari 2012 / Diterima: 23 Jun 2012

ABSTRACT

Aedes aegypti and Aedes albopictus are the principle dengue vectors in Malaysia. The presence and distribution of Aedes larvae were studied in three different localities in Kelantan, Terengganu and Sabah, Malaysia in October 2008, November 2008 and June 2009. Two hundred (200) ovitraps per locality were placed randomly indoors and outdoors, depending on the environment of each locality. The highest mean number of Ae. aegypti and Ae. albopictus larvae per recovered ovitrap for both indoors and outdoors was obtained from Kg. Paya Rambai, Kelantan. The indoor populations of Ae. aegypti as well as the indoor and outdoor populations of Ae. albopictus in Kg. Paya Rambai, Kelantan were significantly higher than the other two study sites (p<0.05) by 1.03- and 4.67-folds, 2.36- and 5.84-folds and 1.98- and 4.00-folds, respectively. Both Ae. aegypti and Ae. albopictus were also found to breed within the same ovitraps placed indoors and outdoors in all study sites ranging from 15.22% to 31.82% of the total positive ovitraps. This study showed that both species could serve as the vectors of dengue in all study sites as indicated by the high populations recorded. The reliability and sensitivity of ovitraps in Aedes surveillance was also proven.

Keywords: Dengue; Malaysia; mixed breeding; ovitrap surveillance

ABSTRAK

Aedes aegypti dan Aedes albopictus adalah vektor denggi yang utama di Malaysia. Kewujudan dan taburan larva Aedes telah dikaji di tiga lokaliti berlainan di Kelantan, Terengganu dan Sabah, Malaysia pada bulan Oktober 2008, November 2008 dan Jun 2009. Dua ratus (200) ovitrap telah dipasang di setiap lokaliti dengan kesemuanya diletakkan secara rambang di dalam dan di luar rumah, bergantung kepada keadaan persekitaran di setiap lokaliti. Bilangan min tertinggi untuk larva Ae. aegypti dan Ae. albopictus bagi ovitrap yang dikutip semula dari dalam dan luar rumah telah diperoleh dari Kg. Paya Rambai, Kelantan. Populasi Ae. aegypti di dalam rumah serta populasi Ae. albopictus di dalam dan di luar rumah di Kg. Paya Rambai, Kelantan adalah lebih tinggi secara bererti (p<0.05) berbanding dua kawasan kajian yang lain sebanyak 1.03- dan 4.67-kali, 2.36- dan 5.84-kali dan 1.98- dan 4.00-kali setiap satu. Kedua-dua Ae. aegypti dan Ae. albopictus juga didapati membiak di dalam ovitrap yang sama yang diletakkan di dalam dan di luar rumah di semua kawasan kajian iaitu di antara 15.22% dan 31.82% daripada jumlah ovitrap yang dikesan positif. Kajian ini menunjukkan bahawa kedua-dua spesies berpotensi sebagai vektor denggi di semua kawasan kajian seperti yang diperlihatkan melalui kadar populasi tinggi yang direkodkan. Kebolehpercayaan dan kepekaan ovitrap dalam kajian survei Aedes juga telah dibuktikan.

Kata kunci: Denggi; kajian survei ovitrap; Malaysia; pembiakan bercampur

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*Pengarang untuk surat-menyurat; email: ika_uitm@yahoo.com