Diphyllobothrium latum eggs measure approximately?

• A. 58–70 μm by 40–50 μm
• B. 20–30 μm by 10–15 μm
• C. 100–120 μm by 60–70 μm
• D. 5–7 μm by 3–4 μm

Answer: (A)

Egg size and morphology are key clues for identifying tapeworms in stool. Diphyllobothrium latum eggs are among the largest human tapeworm eggs, typically about 58–70 μm long and 40–50 μm wide, and they have an operculated shell. This size range is characteristic for this species, making it the best match among the options. The other ranges fall outside the typical dimensions for this parasite and would suggest different species.