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Questions and Answers
True or false: E. gingivalis is morphologically similar to the trophozoite of E. histolytica?
True
True or false: The cyst of E. gingivalis is larger than that of E. histolytica?
True
True or false: E. gingivalis is pathogenic in humans?
False
True or false: The trophozoite of E. gingivalis rarely seen in the stool?
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True or false: E. gingivalis is found in the large intestine?
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Study Notes
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.
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Description
Test your knowledge on E. gingivalis, a morphologically similar amoeba to E. histolytica. Learn about its characteristics, diagnosis methods, and its implications for oral health.
