Virulence factor helpful for entamoeba histolytica to adhere to intestinal mucosa is
**Core Concept**
Entamoeba histolytica is a protozoan parasite that causes amoebic dysentery by invading the intestinal mucosa. Adhesion to the intestinal mucosa is a crucial step for its pathogenesis, and certain virulence factors facilitate this process.
**Why the Correct Answer is Right**
The primary virulence factor responsible for the adhesion of Entamoeba histolytica to the intestinal mucosa is **lectin**, specifically the **Gal/GalNAc lectin**. This lectin binds to the terminal galactose residues on the surface of host cells, enabling the parasite to adhere to the intestinal mucosa. The Gal/GalNAc lectin is a key component of the amoeba's adhesive machinery, allowing it to establish a firm foothold in the intestinal lining and initiate invasion.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not specified. Assuming it's a distractor, it would be incorrect as it doesn't match the known virulence factor for adhesion.
**Option B:** There is no well-documented evidence that **adenylate cyclase** plays a role in the adhesion of Entamoeba histolytica to the intestinal mucosa.
**Option C:** While **proteases** are involved in the pathogenesis of E. histolytica, they are not primarily responsible for adhesion to the intestinal mucosa.
**Option D:** This option is not specified. Assuming it's a distractor, it would be incorrect as it doesn't match the known virulence factor for adhesion.
**Clinical Pearl / High-Yield Fact**
The Gal/GalNAc lectin is a specific target for developing therapeutic interventions against E. histolytica infections. Inhibiting this lectin's activity could potentially block the parasite's ability to adhere to the intestinal mucosa, offering a novel approach to treating amoebic dysentery.
**Correct Answer: C. Gal/GalNAc lectin**