Malaria

A serious, acute and chronic relapsing infection in humans, characterized by periodic attacks of chills and fever, anemia, splenomegaly (enlargement of the spleen), and often fatal complications. Malaria also is found in apes, monkeys, rats, birds, and reptiles. It is caused by various species of protozoa (one-celled organisms) called sporozoans (subphylum Sporozoa) that