What term describes abnormal immune response to normal bacterial antigens in the GI microbiome?

What term describes abnormal immune response to normal bacterial antigens in the GI microbiome?

• A. SIBO
• B. Dysbiosis
• C. Inflammatory bowel disease
• D. Idiopathic antibiotic-responsive diarrhea

Answer: (D)

Abnormal immune response to normal bacterial antigens in the GI microbiome points to inflammatory bowel disease. In IBD, the immune system reacts inappropriately to the normal gut bacteria, leading to chronic inflammation of the intestinal tract. This distinguishes it from a mere imbalance of microbes (dysbiosis) or from conditions driven primarily by bacterial overgrowth (SIBO). It also isn’t defined by diarrhea that merely improves with antibiotics (idiopathic antibiotic-responsive diarrhea), which describes a symptom response rather than the underlying immune-driven process. So the best description is inflammatory bowel disease, encompassing the immune-mediated inflammation seen in Crohn’s disease and ulcerative colitis.

Abnormal immune response to normal bacterial antigens in the GI microbiome points to inflammatory bowel disease. In IBD, the immune system reacts inappropriately to the normal gut bacteria, leading to chronic inflammation of the intestinal tract. This distinguishes it from a mere imbalance of microbes (dysbiosis) or from conditions driven primarily by bacterial overgrowth (SIBO). It also isn’t defined by diarrhea that merely improves with antibiotics (idiopathic antibiotic-responsive diarrhea), which describes a symptom response rather than the underlying immune-driven process. So the best description is inflammatory bowel disease, encompassing the immune-mediated inflammation seen in Crohn’s disease and ulcerative colitis.