Medicine Giardia trophozoites in endoscopic study and biopsy of the duodenum is seen in: A Lactase deficiency B Whipples disease C Abetelipoprotenemia D Immune globulin deficiency 💡 Explanation Giardia trophozoites in endoscopic study and biopsy of the duodenum is seen in: ✓ Correct Answer: D. Immune globulin deficiency