Intestinal dysbiosis contributes to the pathogenesis of which condition?

• A. Chronic inflammatory enteropathy (CIE)
• B. Inflammatory Bowel Disease (IBD)
• C. Irritable bowel syndrome
• D. Gastritis

Answer: (A)

Intestinal dysbiosis disrupts the balance of gut microbes and can drive chronic inflammatory disease of the intestine. When the microbial community becomes less diverse or shifts toward pro-inflammatory species, several downstream effects promote ongoing inflammation: the gut barrier can become more permeable, allowing bacterial antigens to cross into the mucosa; microbial metabolites change in ways that impair healing and regulatory immune function; and mucosal immune cells stay activated, producing cytokines that sustain inflammation. In chronic inflammatory enteropathy, especially in dogs, this dysbiosis is a recognized contributor to persistent gastrointestinal signs and histologic enteritis. Treatments that modulate the microbiota—dietary changes, specific antibiotics, or probiotics—often help reduce inflammation, highlighting the causal role of dysbiosis in CIE. While dysbiosis can be seen in other gastrointestinal disorders like inflammatory bowel disease and irritable bowel syndrome, the association with a persistent enteritis driven by microbial imbalance is most directly aligned with CIE. Gastritis, on the other hand, is typically driven by direct mucosal injury or infection (eg, H. pylori), NSAID effects, or other insults rather than primary dysbiosis-driven enteropathy.