Gastrointestinal infections: Edited by Mitchell CohenUpdate on human infections caused by intestinal protozoaPierce, Kristen K; Kirkpatrick, Beth DAuthor Information Department of Medicine, Unit of Infectious Diseases, University of Vermont College of Medicine, Burlington, Vermont, USA Correspondence to Beth D. Kirkpatrick, MD, UVM College of Medicine, 110 Stafford Hall, 95 Carrigan Lane, Burlington, VT 05405, USA Tel: +1 802 847 2264; e-mail: [email protected] Current Opinion in Gastroenterology: January 2009 - Volume 25 - Issue 1 - p 12-17 doi: 10.1097/MOG.0b013e32831da7dd Buy Metrics Abstract Purpose of review To update the reader on the recent literature discussing human infections due to intestinal protozoa. Recent findings Diarrheal diseases due to intestinal protozoa cause significant morbidity and mortality worldwide in a variety of patient populations. New literature on key pathogens Cryptosporidium, Cyclospora, Isospora, Giardia, and Entamoeba histolytica are discussed. Summary The recent medical literature on these pathogens has focused on new advances in understanding human genetic markers associated with susceptibility to infection and the use of molecular diagnostic techniques for both outbreak investigations (molecular epidemiology) and to understand the variability of clinical disease within species and subspecies. © 2009 Lippincott Williams & Wilkins, Inc.