Giardiasis (Giardia)
Current as of: June 9, 2019
Author: Healthwise Staff
Medical Review:E. Gregory Thompson, MD – Internal Medicine & Adam Husney, MD – Family Medicine & W. David Colby IV, MSc, MD, FRCPC – Infectious Disease
Giardiasis (also called giardia) is an illness caused by infection with the parasite Giardia lamblia, also known as Giardia intestinalis. Giardiasis is usually caused by drinking water that is contaminated with the parasite. In the United States, G. lamblia is most often found in untreated streams, rivers, and lakes…