Choose the incorrect statement w.r.t. amoebiasis

The correct option is "Parasite of the small intestine".

Amoebiasis (also known as amoebic dysentery) is an infectious disease caused by the protozoan parasite Entamoeba histolytica. Let us examine each statement step-by-step to understand why "Parasite of the small intestine" is the incorrect statement:

1. Site of Infection: Entamoeba histolytica is a parasite that infects the large intestine (colon) of humans, not the small intestine. It resides in the mucosal and submucosal layers of the large intestine, where it can cause ulceration. Therefore, the statement claiming it is a "Parasite of the small intestine" is false.

2. Symptoms: Common symptoms of amoebiasis include constipation, abdominal pain, cramps, and stools with excess mucus and blood clots. In severe cases, it causes amoebic dysentery characterized by frequent, watery stools containing blood and mucus. Thus, the statements "Causes dysentery" and "Symptoms include constipation, abdominal pain and cramp" are correct.

3. Transmission: Houseflies (Musca domestica) act as mechanical carriers or vectors that transfer the parasite from the feces of infected individuals to food and water, contaminating them. Hence, the statement "Houseflies are mechanical carriers" is correct.

Since the question asks to identify the incorrect statement, the false claim that the parasite inhabits the small intestine is the correct choice.