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Parasitology

Stool Microscopy: Searching for Protozoa in Acute Diarrhea

Clinical case and stool microscopy in an 18-year-old male with fever and diarrhea. Evaluation of native smear, Romanowsky stain, and Lugol's solution preparation.

Editorial team Editorial team 1 min
Native stool preparation, microscopy of cellular elements, ×400 magnification
Native stool preparation, microscopy of cellular elements, ×400 magnification
Native stool preparation, cluster of rounded cells in the field of view
Native stool preparation, cluster of rounded cells in the field of view
Native stool preparation with additional digital magnification
Native stool preparation with additional digital magnification
Stool smear, Romanowsky-Giemsa stain, microscopy at ×1000
Stool smear, Romanowsky-Giemsa stain, microscopy at ×1000
Native stool preparation, microscopy of suspicious elements
Native stool preparation, microscopy of suspicious elements
Stool smear with Romanowsky-Giemsa stain, immersion magnification
Stool smear with Romanowsky-Giemsa stain, immersion magnification
Stool smear, Romanowsky-Giemsa stain, bacterial flora and cells
Stool smear, Romanowsky-Giemsa stain, bacterial flora and cells
Stool smear, Romanowsky-Giemsa stain, cellular structures at ×1000
Stool smear, Romanowsky-Giemsa stain, cellular structures at ×1000
Stool preparation with Lugol's solution, overview microscopy at ×200 magnification
Stool preparation with Lugol's solution, overview microscopy at ×200 magnification
Stool smear, Romanowsky-Giemsa stain, detailed view of cellular elements
Stool smear, Romanowsky-Giemsa stain, detailed view of cellular elements

Anonymous question. Colleagues, do you see a large number of protozoa morphologically similar to Entamoeba histolytica in the photos?

Male, 18 years old. Ill for a week, temperature 40°C. 4 days of liquid stool. Lugol’s solution preparation ×200. Romanowsky-Giemsa stained ×1000. Native preparation ×400 + phone magnification

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