Which organism is an amoeba that can form liver abscesses in humans?

Which organism is an amoeba that can form liver abscesses in humans?

• A. Entamoeba histolytica
• B. Giardia lamblia
• C. Entamoeba coli
• D. Endolimax nana

Answer: (A)

The key idea is tissue invasion by an amoebic parasite that can reach the liver. Entamoeba histolytica is capable of invading the colonic mucosa and spreading through the portal circulation to the liver, where it forms amebic abscesses. This invasive behavior distinguishes it from the other organisms listed: Giardia lamblia is a flagellate that causes malabsorption and diarrhea but does not invade tissue or form liver abscesses; Entamoeba coli and Endolimax nana are typically nonpathogenic commensals of the gut and do not produce liver abscesses. So the organism that can form liver abscesses in humans is Entamoeba histolytica.

The key idea is tissue invasion by an amoebic parasite that can reach the liver. Entamoeba histolytica is capable of invading the colonic mucosa and spreading through the portal circulation to the liver, where it forms amebic abscesses. This invasive behavior distinguishes it from the other organisms listed: Giardia lamblia is a flagellate that causes malabsorption and diarrhea but does not invade tissue or form liver abscesses; Entamoeba coli and Endolimax nana are typically nonpathogenic commensals of the gut and do not produce liver abscesses. So the organism that can form liver abscesses in humans is Entamoeba histolytica.