Implementation effect of Oncomelania snail control measures in the Yangtze River marshland embankment project

Abstract

Abstract
Background: Oncomelania snails are the intermediate hosts of Schistosoma japonicum, and their control is essential to schistosomiasis prevention in the Yangtze River basin. This study evaluates the effectiveness of snail control measures implemented as part of the Yangtze River marshland embankment project.
Methods: Field surveys were conducted before and after implementation of the embankment and associated snail control interventions. Snail density and habitat area were measured using standard quadrat sampling and recorded over multiple seasons. Changes in snail population, infection risk, and habitat distribution were analyzed to assess the impact of control measures.
Results: The project significantly reduced both the density of Oncomelania snails and the total area of snail-infested marshland. Snail density decreased by [X%] and infected habitats were largely eliminated in the monitored sites. The embankment effectively limited snail dispersal and protected adjacent agricultural and residential areas from re-infestation.
Conclusion: The Yangtze River marshland embankment project successfully reduced Oncomelania snail populations and improved environmental conditions for schistosomiasis control. Continued maintenance and monitoring are recommended to sustain these gains and prevent resurgence.
Keywords: Oncomelania, snail control, schistosomiasis, Yangtze River, marshland embankment, public health intervention