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Giardiasis: a histologic analysis of 567 cases
G Oberhuber1, N Kastner, M Stolte
1Dept. of Clinical Pathology, AKH, University of Vienna, Medical School, Austria.
Scandinavian Journal of Gastroenterology
|January 1, 1997
Summary
Histopathology in giardiasis is often inconspicuous, requiring thorough examination of all small-bowel biopsies for the parasite. Giardiasis does not appear to be linked to specific gastric diseases like chronic atrophic gastritis.
Area of Science:
- Gastroenterology
- Parasitology
- Histopathology
Background:
- The gastrointestinal histopathology of giardiasis is not well-defined.
- This study analyzes 567 patient cases to clarify these findings.
Purpose of the Study:
- To define the histopathologic findings in the upper and lower gastrointestinal tract of patients with giardiasis.
- To investigate potential associations between giardiasis and gastric diseases.
Main Methods:
- Retrospective analysis of 567 giardiasis cases diagnosed between 1988 and 1994.
- Histologic examination of biopsy samples from various gastrointestinal sites.
Main Results:
- Giardia trophozoites were detected in duodenal (82.5%), ileal (12.1%), and gastric antral (8.7%) mucosa, but rarely in the jejunum (2.1%) or colon (0.4%).
- Most duodenal biopsies (96.3%) showed normal histology, with mild villous shortening or inflammation in 3.7%.
- No Giardia-specific changes were found in jejunal, ileal, gastric, or colonic mucosa. A male predominance was observed (61.2%).
- In giardiasis patients with gastric biopsies, Helicobacter pylori-associated gastritis was most common (57.8%).
Conclusions:
- Small-bowel mucosal histology in giardiasis is typically inconspicuous.
- Parasite detection requires examination of all small-bowel biopsy samples.
- Giardiasis is not associated with specific gastric conditions like chronic atrophic gastritis.