Study of Nonoutbreak Giardiasis: Novel Findings and Implications for Research

The presence of intermittent diarrhea contributes to delayed health-seeking behavior and to delayed diagnosis of Giardia. More study is needed to determine if this symptom can help distinguish Giardia from other causes of infectious diarrhea. The occurrence of extraintestinal manifestations of Giardia infection does not appear to be rare, and merits further study.