![]() The infection can also arise any time a break in the skin occurs within the ear canal. It can also occur in environments with high humidity. Swimmer's ear occurs frequently in children because they usually spend more time swimming. ![]() Disease History, Characteristics, and Transmission The parasites die within a few hours, and the symptoms disappear. They only cause mild itchy spots, which later can become raised bumps that are much itchier. These schistosomes cannot become long-term parasites in humans. They cause an allergic reaction, itch, and rash. The parasites then burrow into the skin of swimming humans. The parasites are discharged from infected snails and vertebrates into fresh waters (often slow-moving ponds and lakes). Swimmer's itch-sometimes also called duck itch and clam digger's itch in the United States and various other names around the world-is a distinctly different infection caused by parasitic schistosomes (small flukes that live in blood) that infect snails and vertebrates. Many different types of fungi or bacteria can infect the ear canal-the hollow cylindrical-like opening that allows sounds to enter the eardrum. Swimmer's ear (otitis externa) is an infection of the ear canal and swimmer's itch (cercarial dermatitis) is an allergic reaction to various types of microscopic waterborne parasites infecting human skin. Swimmer's Ear and Swimmer's Itch (Cercarial Dermatitis)ĭisease History, Characteristics, and Transmission
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