![]() ![]() In a normal life cycle that occurs mainly in fresh water but also brackish water, schistosome eggs invade various species of aquatic snails that act as an intermediary hosts. Different parasite species cause the problem. The cercariae causes an allergic maculopapular skin rash in humans that is usually self-limited (usually 4-10 days) but can cause problems for up to 20 days.ĬD parasites are considered an emerging disease because of the increased distribution of the problem across the globe. It is a water-borne, non-communicable infectious disease that is caused by the larval stage (cercariae) of parasitic schistosomatid flukes. If you go there, it helps to wash off right away and change clothes, so the bugs that cause this have less chance to get into his skin,” the pediatrician advised.Ĭercarial Dermatitis (CD) is known by many names throughout the world, but is commonly known as swimmer’s itch. Swimmer’s itch often gets worse with more exposure so I would try to keep away from the lake if you can and swim elsewhere. “This usually takes a few days to go away but I think the medicines should help him be more comfortable. The pediatrician recommended using an antihistamine and prescription strength topical hydrocortisone to help with the pruritis. The diagnosis of swimmer’s itch was made. The mother’s ankles did not have any distinct lesions but did have general erythema because of her rubbing them. He had some distinct excoriations and some generalized erythema of the groups but it was difficult to tell if there was real erythema or it was secondary to rubbing. The lesions were grouped especially in flexural areas of the ankles, knees, groin and buttocks. ![]() The rash was 2-3 mm macules with most having a papular component but no vesicles. His vital signs were normal with growth parameters in the 50-90%. The pertinent physical exam showed a healthy male who was rubbing his legs and groin. The past medical history was non-contributory. They were frequent users of this lake which was known to have swimmer’s itch and she said, “he just lives in the lake when we are there.” The mother said that she was also starting to itch around her ankles that morning. She denied any new soap, lotions, sunscreens, insect repellents or other new products. His mother had tried calamine lotion and over-the-counter strength hydrocortisone cream but said that “he just can’t stop itching.” The rash started on his legs but soon involved the area where his swimsuit had been. He had been swimming in the local freshwater lake over the weekend. A 4-year-old male came to clinic with a pruritic rash for 24 hours. ![]()
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