Apiwathnasorn Chamnarn, Kanjanopas Kobkan, Thammapalo Suwich, Loymak Sumart, Samung Yudthana, Prummongkol Samrerng, Molyneux David
Department of Medical Entomology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
Southeast Asian J Trop Med Public Health. 2003;34 Suppl 2:61-6.
The geographical information system (GIS) and available survey data (both from the Filariasis Annual Reports, 1985-1999 and from the published literature) for the microfilarial infection rates are used to develop the first subdistrict-level endemicity maps of lymphatic filariasis in Narathiwat Province. The maps demonstrated the subdistrict-level geographical distribution of filariasis and the subdistricts at varied degrees of infection rate. The maps also indicate that, since 1985, there was a marked decrease in endemicity at the subdistrict level and in some areas, the infection rates were zero. However, transmission remained in the subdistricts surrounding peat swamp forest (Su-ngai Padi, Paluru, Puyo, Pasemat, Bang Khunthong, and Phron subdistricts). The house locations of infected cases, as well as the vector breeding places were geo-registered and placed as symbolic dots on the base maps obtained from Landsat's Thematic Mapper (TM) 5 and the land use map of Narathiwat to display the distribution of filariasis foci. Of 102 houses mapped, there were 40 houses in primary peat swamp forest (39.22%), 26 in rice fields (25.49%), 15 in fruit orchards (14.70%), 10 in coconut fields (9.80%) and others (10.78%). All the houses were close to the larval habitats presented in the survey. A 2-km buffer zone around the conservation boundary of primary peat swamp forest was created to locate risk areas of filariasis transmission. The buffer zone covered an area of 544.11 km2 and included 88.89% of the houses of infected cases found in 2002. It was able to identify 54 villages located in the buffer area, which might help in the determination of resource needs and resource allocation for filariasis control in Narathiwat Province.
利用地理信息系统（GIS）以及丝虫微丝蚴感染率的现有调查数据（来自1985 - 1999年丝虫病年度报告以及已发表的文献），绘制了北大年府首个次级行政区层面的淋巴丝虫病流行地图。这些地图展示了丝虫病在次级行政区层面的地理分布以及不同感染率的次级行政区。地图还表明，自1985年以来，次级行政区层面的流行程度显著下降，在一些地区，感染率为零。然而，在泥炭沼泽森林周边的次级行政区（宋艾帕迪、帕鲁鲁、普约、帕塞马特、邦昆通和弗隆次级行政区）仍存在传播。将感染病例的房屋位置以及病媒孳生地进行地理注册，并作为符号点标注在从陆地卫星专题制图仪（TM）5获取的底图和北大年府土地利用图上，以显示丝虫病疫源地的分布。在绘制地图的102所房屋中，有40所位于原始泥炭沼泽森林（39.22%），26所在稻田（25.49%），15所在果园（14.70%），10所在椰林（9.80%），其他（10.78%）。所有房屋都靠近调查中呈现的幼虫栖息地。在原始泥炭沼泽森林保护边界周围创建了一个2公里的缓冲区，以确定丝虫病传播的风险区域。该缓冲区面积为544.11平方公里，包括2002年发现的感染病例房屋的88.89%。它能够确定位于缓冲区的54个村庄，这可能有助于确定北大年府丝虫病防治的资源需求和资源分配。
