THURSTON COUNTY, Wash. — Thurston County Public Health and Social Services are warning people of the parasite that causes swimmer’s itch after people reported it at Long Lake Park in Lacey and Clear Lake near Yelm.
Public health officials said multiple people got the rash after swimming at Long Lake Park and two people who live on Clear Lake said they have it.
Officials said swimmers at any freshwater lake need to be aware of the parasite and the ways to avoid being infected.
Swimmer’s itch, also called cercarial dermatitis, looks like a skin rash caused by an allergic reaction. It comes from certain microscopic parasites that infect some birds and mammals. The parasites are released from infected snails into fresh and saltwater and if they come in contact with a swimmer, will burrow into the skin causing a rash.
“Swimmer’s itch is found throughout the world and is more frequent during the summer months,” said health officials. “The parasite does not have long-term effects for those who encounter it.”
Symptoms may include tingling, burning, or itching of the skin.
Follow these steps to help prevent swimmer’s itch:
- Don’t swim in areas where swimmer’s itch is a known problem or where signs have been posted warning of unsafe water.
- Don’t swim near or wade in marshy areas where snails are commonly found.
- Towel dry or shower immediately after leaving the water.
- Apply water-proof sunscreen before getting in the water to protect you from the sun and reduce the ability of the parasite to attach to the skin.
- Do not attract birds (e.g., by feeding them) to areas where people are swimming.