Trematode infections are caused by parasitic flatworms known as trematodes, commonly referred to as flukes. These parasites can infect various organs in humans and animals, leading to diseases such as schistosomiasis and liver fluke infection. People usually become infected by consuming contaminated water or food, or through skin contact with infected water. Symptoms of trematode infections can vary widely, ranging from mild gastrointestinal issues to severe liver damage. Treatment typically involves medications that target the parasites, helping to eliminate them from the body. Preventing these infections often includes improving sanitation and avoiding exposure to contaminated water sources.