Which of the following is typical in cysts of Lodamoeba biitschlii?

• A. A glycogen mass
• B. Blunt chromatoidal bars
• C. Four nuclei with large karyosomes
• D. Many ingested bacteria

Answer: (A)

Cyst morphology and internal contents are key clues for identifying amoebae. In Lodamoeba biitschlii, the cysts characteristically contain a glycogen mass, an energy store that remains inside the cyst during encystment and survival. This dense glycogen inclusion is a distinctive feature that helps differentiate Lodamoeba cysts from cysts of other amoebae, which may show multiple nuclei with large karyosomes, chromatoidal bars, or numerous ingested bacteria. So the glycogen mass is the hallmark you’d expect to see in Lodamoeba biitschlii cysts.