prevalence and transmission of cercariae causing schistosome dermatitis in flathead lake, montana.numerous studies have been conducted on swimmer's itch, but very few have been in montana and none on flathead lake, the largest, natural freshwater lake in the western united states. we conducted a study to determine the prevalence of hosts transmitting cercariae causing swimmer's itch in this lake. hosts for this life cycle were determined by direct observation of fresh waterfowl fecal material for the presence of miracidia, and snails for the presence of cercariae. swimmer's itch-producing ce ...19957623213
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