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Table 3 Results of snail survey in the five PLADs during 2005–2016

From: Surveillance on schistosomiasis in five provincial-level administrative divisions of the People’s Republic of China in the post-elimination era

Year

Areas conducted snail survey (hm2)

Areas with living snails (hm2)

Area of new snail habitats (hm2)

Area with recurrent snails (hm2)

Areas with mollusciciding (hm2)

Areas with environmental modification (hm2)

2005

13 181.83

112.70

1.26

a

261.58

9.06

2006

11 190.36

116.12

0.00

a

306.71

26.36

2007

11 059.95

126.90

4.66

a

239.83

23.34

2008

11 243.00

95.90

0.00

a

184.40

24.02

2009

10 735.92

100.26

0.00

a

110.07

15.12

2010

11 059.37

71.06

0.60

a

117.55

5.16

2011

10 046.77

58.52

0.82

51.74

118.06

4.64

2012

9161.18

79.15

0.61

61.52

320.61

2.77

2013

9326.08

62.52

0.43

35.64

123.77

16.33

2014

9441.76

48.46

1.18

28.90

123.29

3.43

2015

9833.01

47.52

0.43

32.60

103.23

3.88

2016

10 558.53

52.81

1.99

37.15

102.79

5.34

Total

126 837.75

11.98

247.55

2111.89

139.45

  1. ameans not available. – means not applicable