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Title: Malaria in tree crop plantations in south-eastern and western provinces of Thailand
Authors: Pratap Singhasivanon
Krongthong Thimasarn
Surapon Yimsamran
Kenneth Linthicum
Kaew Nualchawee
Darasri Dawreang
Suthep Kongrod
Nilarat Premmanisakul
Wanchai Maneeboonyang
Nelia Salazar
Mahidol University
Thailand Ministry of Public Health
Armed Forces Research Institute of Medical Sciences, Thailand
Asian Institute of Technology Thailand
Keywords: Medicine
Issue Date: 1-Sep-1999
Citation: Southeast Asian Journal of Tropical Medicine and Public Health. Vol.30, No.3 (1999), 399-404
Abstract: During the past three decades almost half of the existing natural tropical forests in Thailand were destroyed and replaced by cash crops, rubber, coffee, fruit orchards (durian, rambutan, mangosteen) and other commercial plantations. In order to determine the proportion of malaria cases contracted from such commercial plantations, an epidemiological study was conducted between June 1996 to May 1997 in two districts, one in Pong Nam Ron, located in a south-eastern province near the Cambodian border and another in Sai Yok, in a western province along the Myanmar border. Data were collected by passive case detection from patients attending the existing malaria clinics and active case detection by monthly malariometric survey in selected villages. All malaria cases were thoroughly investigated and classified according to exposure to different ecotypes prior to onset of malaria symptoms in the preceding two weeks. Malaria cases acquired from commercial plantations accounted for 35.2% and 11.2% in Pong Nam Ron and in Sai Yok districts respectively. In such plantations, most of the malaria cases were contracted from fruit orchards and to a lesser extent from rubber and teak plantations. From this study it is evident that commercial plantations provide a significant site of malaria transmission in addition to the forest and foothills areas in Southeast Asia where efficient vectors such as An. dirus and An. minimus are prevalent and have adapted to such changed ecosystems.
ISSN: 01251562
Appears in Collections:Scopus 1991-2000

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