Staff
The Grey Bruce Health Unit reminds residents and visitors of the risk associated with Swimmer’s Itch.
Swimmer’s Itch, also called cercarial dermatitis, is a skin rash caused by a common allergic reaction to certain microscopic parasites released from infected snails in fresh water such as lakes and ponds.
The parasite’s preferred host is a bird or mammal but it can burrow into skin if comes into contact with a swimmer, particularly if water is left to evaporate after swimming.
Although humans are not suitable hosts and the parasites soon die, they may cause an allergic reaction and rash. The rash is not contagious. Within minutes to days after exposure, individuals may experience tingling, burning, or itching of the skin. Small reddish pimples appear within 12 hours. Pimples may develop into small blisters. Itching may last up to a week or more, but will gradually go away.
To reduce the likelihood of developing Swimmer’s Itch:
· Do not swim in areas where Swimmer’s Itch is a known problem.
· Do not swim or wade in shallow, warm or marshy areas where snails are commonly found.
· Towel dry or shower immediately after leaving the water. Using a dry and clean towel to rub your skin dry vigorously will kill most of the parasites.
Most cases of Swimmer’s Itch do not require medical attention. Try not to scratch. Scratching may cause the rash to become infected. There are generally no long term consequences (other than risk of infection to the open sores). If symptoms persist, or if you are concerned about your health, it is recommended you see a healthcare provider.
Reference: CDC https://www.cdc.gov/parasites/swimmersitch/faqs.html
