A parasite is an organism that lives on or in a host and gets its food from or at the expense of its host. Parasites can cause disease in humans. Some parasitic diseases are easily treated and some are not. The burden of these diseases often rests on communities in the tropics and subtropics, but parasitic infections also affect people in developed countries.
April 25 is World Malaria Day. CDC and partners are working to end malaria for good.
April 14 is International Chagas Day. Learn more about this neglected parasitic infection.
New! Neurocysticercosis CME and CNE for clinicians.
Parasitic Disease and Malaria Strategic Priorities: 2015—2020.
Cyclosporiasis: Most U.S. cases reported in warmer months
Despite Earthquake, Lymphatic Filariasis Program in Haiti Is a Success
NPIs in the U.S. Some parasites affect millions of people in the U.S.