title: [Surveillance of Oncomelania hupensis snails in Baoying and Gaoyou sections of Li Canal in east route of South-to-North Water Diversion Project].
abstract: OBJECTIVE
  To understand the distribution and diffusion of Oncomelania hupensis snails in the Baoying and Gaoyou sections of the Li Canal in the east route of the South-to-North Water Diversion Project.
  
  
  METHODS
  The retrospective survey method was used to investigate the distribution and diffusion of snails in the Baoying and Gaoyou sections of the Li Canal, the conventional survey and the methods of salvage of water and attracting snails were used to detect the distribution of snails in river banks and water.
  
  
  RESULTS
  The earliest findings of snails in the Gaoyou section of the Li Canal was in 1955, the northernmost distribution of snails was Dilong ferry at the west dam and east slope of the Li Canal. The dynamic surveillance in the Gaoyou section of the Li Canal from 2001 to 2010 showed that the snail status was of low density and low fluctuation of area, and the distribution range was 119 degrees 24' 36" -119 degrees 25' 34", 32 degrees 48' 30" -32 degrees 54' 05". From 2006 to 2010, the snails were not found by the methods of salvage of water and attracting snails in the surveillance in the Baoying and Gaoyou sections of the Li Canal.
  
  
  CONCLUSIONS
  So far, there is no evidence showing that the snails spread to northward in the Li Canal, however, it is still necessary to carry out the surveillance of snails and schistosomiasis in the east route of the South-to-North Water Diversion Project.
authors.affiliation: Jiangsu Institute of Schistosomiasis, Wuxi 214064, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Jin-Bin
authors.initials: JB
authors.lastname: Gao
authors.forename: Bo
authors.initials: B
authors.lastname: Zheng
authors.forename: Yi-Xin
authors.initials: YX
authors.lastname: Huang
authors.forename: De-Rong
authors.initials: DR
authors.lastname: Hang
authors.forename: Jian-Feng
authors.initials: JF
authors.lastname: Zhang
authors.forename: Jia-Xiang
authors.initials: JX
authors.lastname: Lu
authors.forename: Yong
authors.initials: Y
authors.lastname: He
authors.forename: Zhong
authors.initials: Z
authors.lastname: Wan
authors.forename: Ya-Ming
authors.initials: YM
authors.lastname: Huang
authors.forename: Yang
authors.initials: Y
authors.lastname: Gao
authors.forename: Yin-Ping
authors.initials: YP
authors.lastname: Zuo
mesh_terms: D000818:Animals; D002681:China; D004197:Disease Reservoirs / Q000469:parasitology; D006801:Humans; D011159:Population Surveillance; D045483:Rivers / Q000469:parasitology*; D012547:Schistosoma / Q000502:physiology; D012552:Schistosomiasis / Q000469:parasitology / Q000517:prevention & control*; D012908:Snails / Q000254:growth & development* / Q000469:parasitology