Parasites: Types, Symptoms, Treatment & Prevention Parasites are organisms that cause parasitic infections, often causing intestinal illnesses like diarrhea and vomiting. They can also cause fever, weakness, fatigue, pain, itchy skin rashes, or infect other parts of the body. Columbia Clinic Urgent Care offers treatment for most parasitic infections. If you have symptoms, consult a … Continue reading Parasites: Types, Symptoms, Treatment & Prevention