Amebic abscess is caused by –
**Core Concept**
Amebic abscess is a type of hepatic abscess caused by a parasitic infection. The underlying principle involves the invasion of the liver by a protozoan parasite, leading to tissue destruction and abscess formation. This condition is primarily associated with **Entamoeba histolytica** infection.
**Why the Correct Answer is Right**
The correct answer is related to **Entamoeba histolytica**, as it is the primary cause of amebic liver abscess. The parasite's pathogenicity is attributed to its ability to invade the intestinal mucosa and spread to the liver via the portal vein, where it causes necrosis and abscess formation. The **Entamoeba histolytica** trophozoite form is responsible for this invasive process.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not specified, but typically, other options might include bacteria or other parasites that are not primarily associated with amebic liver abscess.
**Option B:** Incorrect for the same reason as Option A, lacking specificity but generally referring to non-amebic causes.
**Option C:** Incorrect as it is unspecified but would represent an incorrect choice if it referred to a non-amebic pathogen.
**Option D:** Incorrect, similar to the other options, if it represents a cause other than **Entamoeba histolytica**.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that amebic liver abscesses are more common in individuals with a history of travel to or residence in endemic areas, and they can present with right upper quadrant pain and fever.
**Correct Answer:** D. Entamoeba histolytica.