Histopathology in giardiasis: a correlation with diarrhoea

Area of Science:

• Gastroenterology
• Infectious Diseases
• Parasitology

Background:

• Controversy exists regarding the severity of small bowel mucosal damage from giardiasis.
• The causal link between these histological changes and associated diarrhea is debated.

Purpose of the Study:

• To assess small bowel mucosal damage in giardiasis patients.
• To correlate histological findings with diarrhea severity.
• To evaluate the impact of treatment on mucosal integrity and symptoms.

Main Methods:

• Histological examination of small bowel biopsies in 17 patients.
• Independent assessment and comparison of histology and diarrhea severity.
• Disaccharidase assays in 16 patients.
• Repeat biopsies after treatment in 7 patients.

Main Results:

• Small bowel villous architecture ranged from normal to sub-total villous atrophy.
• A direct correlation was observed between diarrhea severity and villous changes.
• Histological improvement and symptom resolution occurred post-treatment.
• Low lactase activity was noted in patients with moderate/severe diarrhea and some with mild diarrhea.

Conclusions:

• Giardiasis induces a spectrum of small bowel mucosal changes.
• These mucosal alterations are implicated in mediating the diarrhea associated with giardiasis.
• Treatment leads to demonstrable improvements in both gut histology and clinical symptoms.