Spatial And Temporal Analysis The Epidemic Of Schistosomiasis In Poyang Lake Region Based On Climate Change

The climate is one of the important factor spread of infectious diseases, any of its changes are going to produce influence the natural ecological systems and the socio-economic systems. Schistosomiasis,which is mainly prevailing in the Yangtze river basin of Hubei, Hunan, Jiangxi, Anhui, Jiangsu five provinces in our country. Including, the eleven schistosomiasis epidemic areas are mainly located in Poyang lake region and the part of Ganjiang River in Jiangxi Province. In recent years, schistosomiasis is spreading tendency, its is mainly distributed in the area of 8 counties including of 160 townships and towns in Poyang lake region.The number of population infected exceeds 200 million in epidemic area.Its directly affect people's livelihood, which seriously restricted the development of social economy Poyang Lake Ecological Economic Region.It found that prevalence and transmission of Schistosomiasis is closely related to climate factor-such as temperature, light, rainfall and humidity, and it is obviously regional distribution. Oncomelania-as the only intermediate host schistosomia- breeding and distribution directly influence the prevalence and transmission of schistosomiasis. In nature, the Oncomelania activity frequent between April to June and September to October activity. Temperature and light main influence Oncomelania reproductive, Schistosomia development and growth inside the Oncomelania body, Larvae in the environment survive including Miracidia hatching and Cercariae escape et.Rainfall and humidity affected the distribution of Oncomelania habitats.The geographical distribution of Oncomelania determines the spatial distribution of schistosomia. The cercariae of schistosome has a significant seasonal variation in Poyang lake region. This paper selects eight epidemic of schistosomiasis- including nanchang, xinjian, jinxian, poyang, yugan, yongxiu, xingzi and duchang-selected sites search and molluscicidal Oncomelania statistics, the measurement temperature, precipitation ,etc material in Poyang lake region. It construct Poyang lake region of climate change - schistosomiasis transmission index prediction model to predict schistosomiasis spreading. Use Lorenz curve and Theil coefficient analysis of spatial variation Oncomelania islet. Combine GIS technology and Excel, SPSS and other metrology software to analysis the epidemic of schistosomiasis spatial and temporal distribution features in Poyang Lake region based on climate change. The results showed that the rapid increase of prevalence schistosomiasis is not only closely related to the change of each county temperature and precipitation, but also it related to temperature positively and related to precipitation inversely based on climate change in Poyang lake region. The transmission of schistosomiasis not only in time of great differences in scale and the spread of schistosomiasis is large district and spatial variation in Poyang lake region. Appropriate of habitat Oncomelania and schistosoma has been moving northward, also it may cause schistosomiasis transmission will move northward. Further impact on the epidemic situation of schistosomiasis spread in Poyang lake region.The research result will provide basis for decision making the social, economic development and environmental protection in Poyang Lake Ecological Economic Region. Meanwhile it will provide jiangxi province and even the whole country of schistosomiasis prevention jiangxi and even the whole country of schistosomiasis prevention.