![]() ![]() “We don’t want to tell people to not go swimming,” said Patrick Hanington, a professor at the University of Alberta’s School of Public Health. That means a lake with only one or two of the snails could lead to 100 human infections. The parasites are practically invisible in the water, and every lake in Alberta has the potential to be home to the snails that house them.Ī single infected snail can shed thousands of parasites a day. ![]() Unfortunately, if you’re planning to swim in a lake this summer, the itch is hard to avoid. They can even get stuck inside a swimming suit, causing maximum discomfort and embarrassment. You might notice red rings around your legs, indicating parasites were floating on the surface of water. The bumpy red rash can appear instantly or take up to a week to develop. But in the summer months, they sometimes mistakenly encounter humans, penetrating our skin and causing an annoying allergic reaction. The parasites that cause the itchy skin infection look for ducks or muskrats to infect in the water. ![]()
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