Control and prevention

As with tropical human schistosomes, much of the attempts aiming at control of swimmers' itch have been focused on the control of the snail populations in the vicinity of beaches and coastal areas used for recreation. As most of the chemicals tested for this purpose are nonselective and poisonous for many groups of organisms (including man) they are not approved today in most countries. Harvesting of snails from beach areas is a theoretical possibility, whereas prevention of growth of vegetation may have an effect. Recently, attempts have been made to reduce the infection pressure in an area by adding the schistosomicide, praziquantel, to bird feeds and thereby eliminating the infection from the final host (Müller et al. 1993; Reimink et al. 1995).

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