Which term refers to an imbalance between the types of microorganisms in the GI microbiome?

Which term refers to an imbalance between the types of microorganisms in the GI microbiome?

• A. SIBO
• B. Idiopathic antibiotic-responsive diarrhea
• C. Dysbiosis
• D. SIFO

Answer: (C)

Dysbiosis refers to an imbalance in the gut microbial community, meaning the mix and abundance of microorganisms in the GI tract are disrupted. A healthy microbiome is diverse and balanced, with many beneficial bacteria helping digestion, immunity, and barrier function. When balance shifts—diversity drops, or the relative amounts of different microbes change—overgrowth of potential pathogens or loss of helpful species can occur, leading to altered metabolism, inflammation, or symptoms. This term is broad and descriptive of a state, rather than naming a specific overgrowth in one location. In contrast, other terms describe more specific situations: SIBO describes excessive bacterial growth in the small intestine; SIFO refers to fungal overgrowth; and idiopathic antibiotic-responsive diarrhea is a symptom pattern that may improve with antibiotics but isn’t the general description of microbiome balance.

Dysbiosis refers to an imbalance in the gut microbial community, meaning the mix and abundance of microorganisms in the GI tract are disrupted. A healthy microbiome is diverse and balanced, with many beneficial bacteria helping digestion, immunity, and barrier function. When balance shifts—diversity drops, or the relative amounts of different microbes change—overgrowth of potential pathogens or loss of helpful species can occur, leading to altered metabolism, inflammation, or symptoms. This term is broad and descriptive of a state, rather than naming a specific overgrowth in one location. In contrast, other terms describe more specific situations: SIBO describes excessive bacterial growth in the small intestine; SIFO refers to fungal overgrowth; and idiopathic antibiotic-responsive diarrhea is a symptom pattern that may improve with antibiotics but isn’t the general description of microbiome balance.