AIM:To observe the lesion of tegument of Oncomelania snails treated with seed of Camellia Sinensis(SCS) .
目的：了解钉螺体表经茶树籽浸液作用后的损害状况。
2
Objectives to understand the fluctuation and distribution pattern of Oncomelania snails after migrated into marshland where no snail infested.
目的阐明长江下游地区钉螺再次迁入无螺江滩后的钉螺消长和分布变迁规律。
3
These results indicated that the characteristics of the ESTisoenzyme pattern were helpful to studies on relationship on Genus Oncomelania and classification.