Malaria is caused by a parasite transmitted from one human to another via the bite of an infected Anopheles mosquito. The parasites migrate to the liver, mature and enter the bloodstream, where they rupture red blood cells. An infected pregnant woman can transmit malaria to her unborn child.
Review Date 11/5/2021
Updated by: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.