Abstract: Objective To analyze the evolution process， discourse and semantic meaning of schistosomiasis prevention and control， so as to provide suggestions for control work. Methods The official documents and mainstream media reports of schistosomiasis prevention and control were selected at different periods as discourse samples， and the deep social reasons behind the strategy change and the semantic meaning of the utterance were analyzed at different periods. Results The discourse of schistosomiasis prevention and control experienced the evolution of the political discourse， pluralistic discourse and public discourse， and the semantic connotations showed the authority conflict semantic features， and then transferred to semantic cooperation. Conclusion The prevention and control of schistosomiasis have different semantic meanings at different periods， and the prevention and control work should correspond to a social practice， seek truth from facts， correctly understand the actual situation， and then establish the effective control policy.

Key words: Schistosomiasis； Control strategy； Discourse； Semantics

摘要： 目的 分析我国血吸虫病防治话语的演变过程及其语义内涵，为血防工作提供建议。方法 选取不同时期的血吸虫病防治文档及主流媒体有关血吸虫病防治的报道作为话语样本，分析血防话语演变的过程，及不同时期血防话语的语义内涵。结果 血防话语经历了政治话语、多元话语及公众话语的演变过程，其语义内涵在不同时期表现出权威语义、冲突语义的特点，并向合作语义发展。结论 不同时期的血吸虫病防治有不同的语义内涵，血防工作要与社会实际相适应。实事求是，正确深入了解血防实际，才能制定出有效的血防政策。

关键词: 血吸虫病；防治策略；话语；语义