👉 Nematodirus is a type of fungus that causes a disease called "roundworm" or "roundworm infestation". It is typically found in soil, compost, and other organic matter, where it can thrive. The infection spreads through contact with contaminated soil, soil particles, or the bodies of infected animals. Symptoms include abdominal pain, diarrhea, and fever, often accompanied by a rash on the skin.