[Distribution of susceptible areas of schistosomiasis outside embankment in Hunan Province, 2011].

OBJECTIVE

To investigate the current distribution of susceptible areas of schistosomiasis outside embankment, so as to provide the evidence for making comprehensive measures in Hunan Province.

METHODS

The outside embankment areas where Oncomelania snails possibly or historically distributed and people and animals had activities were surveyed. The schistosomiasis information of the susceptible areas was collected, a database was set up, the positions were marked with GPS, an E-map was drawn with Google Earth, and the distribution was analyzed.

RESULT: The number of marshlands with schistosomiasis susceptible areas outside embankment was 787, the length was 1,429.64 km, and the area was 6,2017.17 hm(2). The average density of living snails was 0.37 snails/0.1 m(2), and the average density of infected snails was 0.0019 snails/0.1 m(2). The infected snails were found in 180 marshlands, and the area was 688.07 hm(2). Sixteen rivers had the susceptible areas, and the main vegetation was weeds.

CONCLUSIONS

The susceptible area of schistosomiasis outside embankment is wide and complex. Therefore, the comprehensive control measures should be strengthened.