An illness caused by the protozoan Giardia lamblia and characterized by diarrhea, abdominal cramps, bloating, weight loss, or malabsorption. Infected persons may be asymptomatic.
A clinically compatible case that is epidemiologically linked to a confirmed case
A case that is laboratory confirmed
The 1997 case definition appearing on this page was re-published in the 2001 CSTE position statement 2001-ID-08 and the 2009 CSTE position statement 09-ID-34.1 Thus, the 1997, 2002, and 2010 versions of the case definition are identical.