Enterobius vermicularis morphology
(Pinworm infection)

The eggs are elongated and flattened on one side with a thick colorless shell, measuring from 50-60 mm by 20-30 mm.

When found in feces, the eggs are typically unembryonated as seen in this wet preparation.

The typical embryonated (infective) eggs are usually seen in the cellulose tape preparation the most reliable means for detecting the parasite (not illustrated).