Geographic information systems and the environmental risk of schistosomiasis in Bahia, Brazil
Geographic information systems and the environmental risk of schistosomiasis in Bahia, Brazil
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DOI：
10.4269/ajtmh.1999.60.566
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发表时间：
1999-04-01
影响因子：
3.3
通讯作者：
Shane, SM
中科院分区：
文献类型：
--
作者：
Bavia, ME;Hale, LF;Shane, SM
利用区域环境特征、30个代表性城市曼氏血吸虫流行率和巴西巴伊亚蜗牛分布图构建了一个地理信息系统，以研究感染的时空动态，并确定影响血吸虫病分布的环境因素。结果表明，人口密度和每年的干旱期的持续时间是最重要的决定因素，血吸虫病的流行在选定的研究地区。最大降雨量、连续3个月的总降水量、年最高或最低气温、日温差对S.当地人群中的曼氏病流行率或蜗牛宿主的分布。该州沿海地区的发病率最高。较高的患病率往往发生在latossolo土壤类型和过渡植被的地区。
A geographic information system was constructed using maps of regional environmental features, Schistosoma mansoni prevalence in 30 representative municipalities, and snail distribution in Bahia, Brazil to study the spatial and temporal dynamics of infection and to identify environmental factors that influence the distribution of schistosomiasis. Results indicate that population density and the duration of annual dry period are the most important determinants of prevalence of schistosomiasis in the areas selected for study. Maximum rainfall, total precipitation during three consecutive months, annual maximum or minimum temperatures, and diurnal temperature difference were not shown to be significant factors influencing S. mansoni prevalence in local populations or distribution of snail hosts. prevalence of the disease was highest in the coastal areas of the state. Higher prevalence tended to occur in areas with latossolo soil type and transitional vegetation.