**Question:** Which of the following infestations leads to malabsorption -

A. Trichuriasis
B. Hepatitis
C. Pneumonia
D. Dengue fever

**Core Concept:** Malabsorption is a condition in which the body cannot properly absorb essential nutrients from the consumed food due to various factors such as parasitic infections, inflammation, or structural abnormalities.

**Why the Correct Answer is Right:** A. Trichuriasis (also known as trich) is caused by the parasitic worm Trichuris trichiura. Trichuriasis primarily affects the small intestine, where the worms can obstruct the intestinal lumen and impair nutrient absorption. This leads to malabsorption symptoms like diarrhea, abdominal pain, and weight loss.

**Why Each Wrong Option is Incorrect:**

B. Hepatitis (caused by viruses, bacteria, or other pathogens) primarily affects the liver and leads to liver inflammation, rather than malabsorption. Hepatitis does not directly impair nutrient absorption in the small intestine.

C. Pneumonia (caused by bacterial, viral, or fungal infections) affects the lungs and leads to respiratory distress, cough, and fever, but does not directly cause malabsorption in the small intestine.

D. Dengue fever (a viral infection transmitted by mosquitoes) primarily affects the liver and bone marrow, causing symptoms like hepatosplenomegaly, anemia, and thrombocytopenia. While dengue fever can cause gastrointestinal manifestations like abdominal pain and vomiting, it does not directly lead to malabsorption in the small intestine.

**Core Concept (repeated for clarity):** Malabsorption is a condition in which the body cannot properly absorb essential nutrients from ingested food due to various factors affecting the small intestine.

**Clinical Pearl:** Trichuriasis (trich) is a specific example of an intestinal parasitic infection causing malabsorption symptoms. It highlights the importance of considering parasitic infections in endemic regions when assessing patients with malabsorption symptoms.