Drainage from an oral gum lesion revealed the presence of a possible amoeba. An amoeba with a single nucleus and ingested WBCs was noted in a trichrome-stained preparation of the drainage material. Which of the following is the probable parasite found in this sample?

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Quizplus · Accepted Answer

Entamoeba gingivalis is the amoeba most commonly associated with oral infections, particularly in the context of gum lesions. Unlike Entamoeba histolytica/dispar, which primarily affects the colon and can cause dysentery, or Entamoeba polecki, which has a different host specificity and presentation, Entamoeba gingivalis is found in the mouth and is not known to cause systemic disease. Trichomonas tenax, while also found in the oral cavity, is a flagellate and not an amoeba.

Drainage from an Oral Gum Lesion Revealed the Presence of a Possible