Prevention
Avoid direct contact with fresh water in risk areas. Wear rubber boots if you expect to wade in fresh water. If direct contact occurs, towel dry your skin vigorously as soon as possible.
Travellers visiting endemic areas should assume all fresh water may be infected. Dams, slow-moving streams, rivers and lakes often pose a high risk, as does showering in water from rivers.
Water free of snails that has been left to stand for three days is safe to drink after it has been boiled, or another effective method of water treatment has been used.
There is no risk in salt water or chlorinated swimming pools.