GI Nutrition & Gut Health 5

Question 1

Which test is considered the gold standard for diagnosing small intestinal bacterial overgrowth (SIBO)?

Accepted Answer

Jejunal aspirate culture (>10^3 CFU/mL)

Answer

Quantitative culture of jejunal aspirate showing >10^3 CFU/mL is the gold standard for SIBO diagnosis, though breath testing is more commonly used clinically.

Question 2

A patient with Crohn's disease affecting the terminal ileum is at highest risk for deficiency of which nutrient?

Accepted Answer

Vitamin B12

Answer

The terminal ileum is the exclusive site of vitamin B12 absorption; Crohn's disease or ileal resection in this segment leads to B12 deficiency.

Question 3

Which dietary modification is most beneficial for patients with gastroparesis?

Accepted Answer

Small, frequent, low-fat and low-fiber meals

Answer

Small, frequent meals that are low in fat and fiber reduce gastric emptying delay in gastroparesis patients.

Question 4

Niacin deficiency (pellagra) can occur in patients with carcinoid syndrome due to excess conversion of tryptophan to which substance?

Accepted Answer

Serotonin

Answer

Carcinoid tumors divert tryptophan toward serotonin synthesis, depleting the substrate available for niacin (vitamin B3) production.

Question 5

In a patient with newly diagnosed Wilson's disease, which dietary modification is recommended?

Accepted Answer

Low-copper diet (avoid shellfish, liver, nuts, chocolate)

Answer

Wilson's disease patients should avoid high-copper foods like shellfish, liver, nuts, and chocolate to reduce copper accumulation.

(GI) Gastrointestinal Practice Test

(GI) Gastrointestinal Practice Test

GI Nutrition & Gut Health 5