Question

Flask shaped ulcers in intestine caused by

• A. Giardia lamblia
• B. Entamoeba histolytica
• C. Helicobacter pylori (H. pylori)
• D. E. vermicularis

Answer 1

The Correct Option is B

Flask-shaped ulcers in the intestine are typically caused by Entamoeba histolytica. This protozoan parasite is responsible for amebiasis, which can lead to severe intestinal issues. Here's how it causes these flask-shaped ulcers:

• Infection Process: Entamoeba histolytica invades the intestinal wall, often starting with the colon, by secreting enzymes that break down the mucosal lining.
• Ulcer Formation: As the parasite penetrates deeper, it creates lesions that can widen, forming a distinct 'flask shape' as the ulcer spreads both longitudinally and transversely beyond the initial penetration point.
• Symptoms: Patients often exhibit abdominal pain, diarrhea, and sometimes blood in stools due to these ulcers.

Other options listed do not cause flask-shaped ulcers:

• Giardia lamblia: Causes giardiasis, primarily leading to malabsorption and non-ulcerative symptoms.
• Helicobacter pylori (H. pylori): Mainly associated with peptic ulcers in the stomach and duodenum.
• E. vermicularis: Commonly known as pinworm, affecting mainly the anal area causing itching, but not linked to intestinal ulcers.