Giardia lamblia in patients undergoing upper G.I. endoscopy

Area of Science:

• Gastroenterology
• Infectious Diseases
• Parasitology

Background:

• Dyspepsia and upper gastrointestinal (G.I.) disorders are common clinical complaints.
• The role of Giardia lamblia as a causative agent in dyspepsia is often underestimated.
• Standard diagnostic methods may not always detect parasitic infections.

Purpose of the Study:

• To investigate the prevalence of Giardia lamblia infection in patients undergoing upper G.I. endoscopy.
• To assess the diagnostic yield of duodenal aspirates and biopsies for Giardiasis.
• To evaluate the significance of Giardia as a cause of dyspepsia.

Main Methods:

• Prospective collection of duodenal aspirates from 200 patients undergoing upper G.I. endoscopy for dyspepsia.
• Collection of simultaneous duodenal biopsies from 163 of these patients.
• Microscopic examination of aspirates and biopsies for Giardia lamblia trophozoites.

Main Results:

• Giardia lamblia trophozoites were identified in 9% of duodenal aspirates.
• Giardia lamblia was detected in 1.8% of duodenal biopsies.
• A higher detection rate was observed in aspirates compared to biopsies.

Conclusions:

• Giardiasis should be considered in the differential diagnosis of dyspepsia, particularly in patients with persistent symptoms.
• Patients with negative upper G.I. endoscopy results or those who remain symptomatic despite treatment may harbor Giardia lamblia.
• Diagnostic strategies for dyspepsia should include consideration for parasitic infections like Giardiasis.