Microscopy Challenge: Identifying Findings in Leopard Gecko Feces

A diagnostic copro-ovoscopy challenge: microscopy of a native leopard gecko fecal sample with Lugol's solution, 400x magnification. Help identify the structures.

Editorial team 1 min March 9, 2026

Fecal smear with Lugol's solution, microscopy at 400x magnification

Microphotograph of an unidentified object in a leopard gecko fecal smear

Overview field of view of fecal microscopy at 400x magnification

Rounded object in a fecal smear, stained with Lugol's solution

Field of view with several structures in a reptile fecal smear

Oval formation in a native fecal smear with Lugol's solution

Microscopic finding in leopard gecko feces at 400x magnification

Anonymous question from a subscriber. Good morning! Please help identify the findings 🙏 I’ve examined the feces 6 times in a row and at intervals, and I’m finding objects that are unclear to me, in addition to familiar nematodes. Leopard gecko feces (insectivorous), 400x magnification, Lugol’s solution. Other animals do not have such objects (if a question about food arises)

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