[Growth and decline of oncomelania snail status of canals in Qianjiang City in Four Lake areas, 1990-2010].

OBJECTIVE

To understand the growth and decline of Oncomelania snail status in canals of Four Lake areas, so as to provide the evidence for formulating control strategy.

METHODS

The data of snail investigations were analyzed retrospectively.

RESULTS

The snail area decreased by 31.05%, the snail density decreased by 92.08, and the infection rate of snails decreased by 87.69% in 2010 compared with those in 1990.

CONCLUSION

During the period of 1990 to 2010, all the key indicators of snail status decline. However, we still need strengthen the snail control.