Enterobius vermicularis

Source

Dr. Evelia Malla Pérez, pharmacist specialized in clinical analysis, Servicio de Análisis Clinicos, Hospital Universitario de Burgos, Spain.

Description

One egg of the parasite enteroboius vermicularis (arrow) and bacteria. The eggs of enterobius vermicularis have a typical ovoid shape with one slightly flattened side, a double-layered wall, which contains the embryo, and a major diameter of about 25 to 50 µm. The finding of these eggs in the urine indicates contamination from the perianal/perineal region, where the eggs are laid at night by the gravid worm female.

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