| Co-Investigator(Kenkyū-buntansha) |
プラコン ファヌライ タイ公衆衛生省, 医科学局・予防衛生研究所, 部長
NIPON Jayamangkala Dean, Faculty of Agricultural Production, Maejo Inst. of Agricultural Technology, 農業生産学部, 学部長
チラポン スパワディー チェンマイ大学, 医学部, 助教授
ワナパ スワンカード タイ公衆衛生省, マラリア局・第2地域センター, 主任研究員
チラサク カンブンルアン チェンマイ大学, 医学部・健康科学研究所, 所長
ESHITA Yuki Lecturer, Dept. of Parasitology, Kurume Univ., School of Medicine, 医学部, 講師 (10082223)
SUGIYAMA Akira Associate Professor, Laboratory of Medical Ecology, Nagoya Women's Univ., 短期大学部, 助教授 (30196761)
FUKUI Hayao Professor, The Center for Southeast Asian Studies, Kyoto University, 東南アジア研究センター, 教授 (10027584)
IGARASHI Akira Professor, Dept. of Virology, Inst. of Tropical Medicine, Nagasaki Univ., 熱帯医学研究所, 教授 (40029773)
TSUDA Yoshio Research Associate, Dept. of Medical Entomology, Inst. of Tropical Medicine, Nag, 熱帯医学研究所, 助手 (20207393)
TAKAGI Masahiro Associate Professor, Dept. of Medical Entomology, Inst. of Tropical Medicine, Na, 熱帯医学研究所, 助教授 (60024684)
JIRAPORN Supawadee Associate Professor, Dept. of Microbiology, Faculty of Medicine, Chiangmai Univ.
WANNAPA Suwonkerd Chief Entomologist, Malaria Center 2, Ministry of Public Health
CHIRASAK Khamboonruang Director, Research Institute for Health Sciences, Chiangmai Univ.
PRAKONG Phan-urai Director, Division of Medical Entomology, National Inst. of Health, Dept. of Med
チラポン スパワディ チェンマイ大学, 医学部, 助教授
プラコン ファヌテイ タイ公衆衛生省, 医科学局予防衛生研究所, 部長
チラサク カンプンルアン チェンマイ大学, 医学部, 所長
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| Budget Amount *help |
¥14,000,000 (Direct Cost: ¥14,000,000)
Fiscal Year 1993: ¥7,000,000 (Direct Cost: ¥7,000,000)
Fiscal Year 1992: ¥7,000,000 (Direct Cost: ¥7,000,000)
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| Research Abstract |
The epidemiology of Japanese encephalitis(JE)was studied in 1992 and 1993 from viewpoints not only of medical entomology and virology but also of agriculture, including rice cultivation and livestock breeding, and cultural anthropology in Thailand where large-scaled epidemics of JE have continued since 1969. Abundance of larval and adult mosquitoes was monitored monthly in three villages in northern Thailand in relation to rice cultivation and JE virus infection in mosquitoes and pigs, which are the main amplifying animal of JE virus. In 6 provinces selected from whole Thailand, adult mosquitoes were also monthly collected by a light trap at three pigsties. The results demonstrated that Culex tritaeniorhynchus is the most important JE vector throughout Thailand, and that the density of vector mosquitoes, therefore the epidemic of JE also, is strongly influenced by the practice of rice cultivation. By considering these results together with published statistics on annual changes in the number of human cases, the number of pigs, the area of rice fields and others in each district of Thailand, the following was pointed out : (1) the sudden increase of JE cases from 1969 onward is probably due to the expansion of rice fields by deforestation ; (2) the higher incidence of JE human cases in northern areas is ascribed to the higher density of vectors ; and (3) in view of recent change in the life style of inhabitants through rapid modernization, JE epidemic in Thailand will tend to be lowered in the future.
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