What is an acceptable diagnostic clue on aspiration of an amoebic liver abscess?

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Study for the Introduction to Parasitology Test. Use flashcards and multiple-choice questions, each question offers hints and explanations. Prepare for your exam thoroughly!

Multiple Choice

What is an acceptable diagnostic clue on aspiration of an amoebic liver abscess?

Explanation:
Direct visualization of Entamoeba histolytica trophozoites containing red blood cells in the aspirate is the diagnostic clue for an amoebic liver abscess. This ingestion of red blood cells by the trophozoites is a distinctive, highly specific feature of amoebic infection and helps distinguish it from a pyogenic (bacterial) abscess. Bile pigments would point to biliary issues rather than amoebiasis; bacterial colonies like Klebsiella suggest a bacterial abscess; helminth eggs are not associated with amoebic liver disease. So, finding trophozoites with ingested red blood cells provides the clearest diagnostic signal in this context.

Direct visualization of Entamoeba histolytica trophozoites containing red blood cells in the aspirate is the diagnostic clue for an amoebic liver abscess. This ingestion of red blood cells by the trophozoites is a distinctive, highly specific feature of amoebic infection and helps distinguish it from a pyogenic (bacterial) abscess. Bile pigments would point to biliary issues rather than amoebiasis; bacterial colonies like Klebsiella suggest a bacterial abscess; helminth eggs are not associated with amoebic liver disease. So, finding trophozoites with ingested red blood cells provides the clearest diagnostic signal in this context.

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