The History Of The Epidemic Of Schistosomiasis In Yunnan Province

Yunnan is one of significant province with epidemic ofSchistosomiasis in the history. It belongs to hilly endemic area. The papertakes two most serious counties--Eryuan and Weishan as examples on thebasis of the overall situation of schistosomiasis epidemic in Yunnanprovince and uses historical data like reports of schistosomiasis control in1950s and local chronicles, trying to answer when the epidemic beganand why it got prevalent and the significance of hilly-type in Yunanprovince by comparing the situation and epidemic models with otherregions with schistosomiasis epidemic. Eryuan County and WeishanCounty are located in Dali Bai autonomous prefecture. Both of them havenorth-south rivers which are crucial for the county’s agricultural irrigation.The most serious area of schistosomiasis is distributed in the upstream.Schistosomiasis epidemic of Eryuan County has something to do withsevere floods of Miju river, while WeiShan’s schistosomiasis epidemic islinked to severe droughts in the county. People launched waterconservancy projects, governed the rivers, and built pouds, dug canals and ditches to fight floods and droughts. It is the process of repairing orscraping that caused the differences of schistosomiasis epidemic indifferent regions.