Abstract:

Hubei is one of the most serious outbreak regions of schistosomiasis，and it is the focus of schistosomiasis’s control and prevention in China.In recent years,although schistosomiasis’s control and prevention in Hubei Province has made remarkable achievements,outbreaks still occur frequently.To achieve the task of blocking schistosomiasis transmission,a lot of work needs to do.As 〖WTBX〗Oncomelania hupensis〖WTBZ〗 is the only middle vector of schistosome,elimination and control of 〖WTBX〗Oncomelania hupensis〖WTBZ〗 have become the most important and effective way to control and prevent schistosomiasis.This paper carried out a detailed mapping and spatial analysis of 〖WTBX〗Oncomelania hupensis〖WTBZ〗’s geographical distribution in Hubei Province.It is of clear indicative significance to position the key areas of 〖WTBX〗Oncomelania hupensis〖WTBZ〗’s elimination and control.Firstly,Annual Schistosome Reports of Hubei Province and the data of 〖WTBX〗Onocomelania hupensis〖WTBZ〗 survey and extermination in each counties were collected.〖WTBX〗Onocomelania hupensis〖WTBZ〗’s attribute data were imported into the vector layer of administrative counties of Hubei Province with software ArcGIS 92.Then,Hubei 〖WTBX〗Onocomelania hupensis〖WTBZ〗’s geographic information database was set up，and the electronic map of the distributing districts that 〖WTBX〗Onocomelania hupensi〖WTBZ〗 inhabit was established.By analyzing,the following conclusions can be drawn out: (1) 〖WTBX〗Onocomelania〖WTBZ〗 and 〖WTBX〗Onocomelania hupensis〖WTBZ〗’s susceptible areas distributed in both shores of the middle reaches of the Yangtze River and the Han River,and across flooding areas of lakes connecting with this two river，forming a clearly thick belt. (2) The 〖WTBX〗Onocomelania hupensis〖WTBZ〗’s geographical distribution areas of the three schistosomiasis endemic types，including the subtype of lakes and marshes outside embankment,the subtype of lakes and marshes inside embankment and the type of massif，display significant regional differences. (3) Bottomland of rivers and lakes,which present a narrow Yshaped along the two rivers,is the main breeding environment of 〖WTBX〗Onocomelania hupensis〖WTBZ〗,and distribution of 〖WTBX〗Onocomelania hupensis〖WTBZ〗 in areas of ditches and ports is wide and discrete