Swimmer's itch primary prevention: Difference between revisions
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==Primary | ==Primary Prevention== | ||
Various strategies, targeting either the [[mollusc]] or avian hosts of schistosomes, have been used by lakeside residents in recreational areas of North America to deal with outbreaks of swimmer's itch. In Michigan, for decades authorities used [[copper sulphate]] as a molluscicide to reduce snail host populations and thereby the incidence of swimmer's itch. The results with this agent have been inconclusive, possibly because | Various strategies, targeting either the [[mollusc]] or avian hosts of schistosomes, have been used by lakeside residents in recreational areas of North America to deal with outbreaks of swimmer's itch. In Michigan, for decades authorities used [[copper sulphate]] as a molluscicide to reduce snail host populations and thereby the incidence of swimmer's itch. The results with this agent have been inconclusive, possibly because | ||
* Snails become tolerant | * Snails become tolerant | ||
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[[Category:Parasitic diseases]] | [[Category:Parasitic diseases]] | ||
[[Category:Diseases]] | [[Category:Diseases]] | ||
[[Category:Emergency medicine]] | [[Category:Emergency medicine]] | ||
[[Category:Needs overview]] | [[Category:Needs overview]] | ||
Latest revision as of 00:21, 30 July 2020
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Risk calculators and risk factors for Swimmer's itch primary prevention |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Primary Prevention
Various strategies, targeting either the mollusc or avian hosts of schistosomes, have been used by lakeside residents in recreational areas of North America to deal with outbreaks of swimmer's itch. In Michigan, for decades authorities used copper sulphate as a molluscicide to reduce snail host populations and thereby the incidence of swimmer's itch. The results with this agent have been inconclusive, possibly because
- Snails become tolerant
- Local water chemistry reduces the molluscicide's efficacy
- Local currents diffuse it
- Adjacent snail populations repopulate a treated area. [2]
More importantly, perhaps, copper sulphate is toxic to more than just molluscs, and the effects of its use on aquatic ecosystems are not well understood. Another method targeting the snail host, mechanical disturbance of snail habitat, has been also tried in some areas of North America[3] and Lake Annecy in France, with promising results. Some work in Michigan suggests that administering praziquantel to hatchling waterfowl can reduce local swimmer's itch rates in humans.[4] Work on schistosomiasis showed that water-resistant topical applications of the common insect repellent DEET prevented schistosomes from penetrating the skin of mice.[5]
Public education of risk factors, a good alternative to the above-mentioned interventionist strategies, can also reduce human exposure to cercariae.