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Related Experiment Videos

Entamoeba gingivalis in sputum smears.

A H Dao

    Acta Cytologica
    |July 1, 1985
    PubMed
    Summary

    Entamoeba gingivalis, a common oral parasite, can appear in sputum smears. Recognizing its distinct phagocytic behavior and potential symbiosis with Actinomyces is crucial for accurate diagnosis.

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    Area of Science:

    • Microbiology
    • Parasitology
    • Medical Diagnostics

    Background:

    • Entamoeba gingivalis is a prevalent protozoan parasite residing in the human oral cavity.
    • Its presence in Papanicolaou-stained sputum smears is infrequent and can be overlooked.
    • Accurate identification is essential for differential diagnosis and understanding oral-associated conditions.

    Observation:

    • Two cases presenting Entamoeba gingivalis in sputum are detailed.
    • Morphologic characteristics of the ameba, including trophozoite structure, were documented.
    • Trophozoites were observed actively phagocytizing leukocytes and erythrocytes.

    Findings:

    • Entamoeba gingivalis trophozoites exhibit phagocytosis of both leukocytes and red blood cells.
    • This phagocytic behavior differs from Entamoeba histolytica, which primarily phagocytizes red blood cells.
    • Actinomyces sp. organisms were concurrently identified in one patient, suggesting a potential symbiotic relationship.

    Implications:

    • The findings highlight the importance of considering Entamoeba gingivalis in sputum analysis, especially when other oral pathogens are suspected.
    • Distinguishing E. gingivalis from E. histolytica is critical, as E. histolytica can cause pulmonary abscesses.
    • The potential symbiotic relationship with Actinomyces warrants further investigation in various anatomical sites, including the female genital tract.

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