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Table 3 Results of snail survey in Yizheng County along the Yangtze River during the period from 2001 through 2015

From: An integrated environmental improvement of marshlands: impact on control and elimination of schistosomiasis in marshland regions along the Yangtze River, China

Year Snail survey (km2) Area of snail habitats (km2) S. japonicum infection in snails Area of infected snail habitats (km2)
Outside embankment Inside embankment No. snails examined Infection in snails (%)
2001 16.8 1.87 0.05 9464 0 0
2002 16.8 1.89 0.06 11955 0.03 0.02
2003 16.8 1.79 0.1 14175 0.12 0.16
2004 16.82 1.59 0.13 12177 0.07 0.24
2005 16.82 1.59 0.13 11938 0.02 0.09
2006 16.82 0.72 0.14 2445 0.12 0.01
2007 16.82 0.37 0.005 4342 0 0
2008 16.82 0.17 0.005 849 0 0
2009 9.14 0.14 0.009 1111 0 0
2010 9.14 0.15 0.008 2287 0 0
2011 9.14 0.16 0.009 1352 0 0
2012 9.14 0 0 0 0 0
2013 9.14 0 0 0 0 0
2014 9.14 0 0 0 0 0
2015 9.14 0 0 0 0 0