Babesiosis refers to a condition caused by microscopic parasites that infect the red blood cells. Many people who are infected with Babesia parasites do not experience any symptoms of the condition. When present, signs and symptoms may include flu-like symptoms such as fever, chills, headache, body aches, nausea and fatigue. In severe cases, babesiosis can be associated with hemolytic anemia. Babesia parasites are primarily spread by infected ticks. Treatment is generally only required in people who develop symptoms of the condition. When necessary, affected people are often prescribed a combination of antimicrobial medications along with supportive care to manage symptoms. The disease is babesiosis (MONDO_0005661). Also known as: Babesia caused disease or disorder, Babesia disease or disorder, Babesia infectious disease, babesiasis, infection by Babesia, piroplasmosis.