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

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

Year	Snail survey (km²)	Area of snail habitats (km²)		S. japonicum infection in snails		Area of infected snail habitats (km²)
Year	Snail survey (km²)	Outside embankment	Inside embankment	No. snails examined	Infection in snails (%)	Area of infected snail habitats (km²)
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

ISSN: 2049-9957