Quiz

Morphology and Diagnosis of E. gingivalis

• E. gingivalis is morphologically similar to the trophozoite of E. histolytica.
• It has a few to several fine ger-like pseudopodia, finely granular endoplasm, and clear ectoplasm.
• Diagnosis is made by demonstrating trophozoites in materials removed from the gingival margin, between the teeth, or from cavities of decayed teeth.
• The presence of this amoeba in the mouth suggests the need for better oral hygiene.

Characteristics of Endolimax nana

• Endolimax nana is a very small amoeba, with trophozoites measuring 6-12 µM and cysts measuring 5-8 µM.
• It lives in the large intestine and is non-pathogenic.
• The ectoplasm and endoplasm are distinct, with a large endosome and no peripheral chromatin.
• The trophozoite does not ingest or invade the host tissues.

Life Cycle and Characteristics of Endolimax nana

• The parasite has two stages: trophozoite and cyst.
• The trophozoite is rarely seen in the stool, except in frankly diarrheal cases.
• The cyst is larger than that of E. histolytica.

Characteristics of Entamoeba gingivalis

• Entamoeba gingivalis is a non-pathogenic amoeba, also known as a commensal parasite.
• It has only a trophozoite stage, measuring 10-20 µM in diameter.
• It is found in the mouth, specifically in the roots of teeth and the gum.