What are the three main categories of chronic enteropathy used in veterinary practice?

• A. Food allergy, parasitic infection, and viral enteritis.
• B. Nutritional deficiency, bacterial overgrowth, and neoplasia.
• C. Food-responsive enteropathy (FRD), antibiotic-responsive enteropathy (ARE), and immunosuppressant-responsive enteropathy (IRE, commonly inflammatory bowel disease).
• D. Acute diarrheal disease, chronic kidney disease, and pancreatitis.

Answer: (C)

In chronic enteropathy, veterinarians organize cases by how the disease responds to treatment, not just by suspected cause. The three main categories reflect practical therapy routes: Food-responsive enteropathy, antibiotic-responsive enteropathy, and immunosuppressant-responsive enteropathy. A diet trial—using a novel protein or an easily digestible/hydrolyzed diet—helps identify Food-responsive enteropathy, because clear clinical improvement with the diet supports dietary antigens as the driver. If the animal doesn’t improve with diet but improves with antibiotics, that points to Antibiotic-responsive enteropathy, often related to dysbiosis or bacterial overgrowth. If neither diet nor antibiotics yields lasting improvement, immunosuppressive therapy tends to help, indicating immune-mediated inflammation typical of immunosuppressant-responsive enteropathy (inflamamatory bowel disease). The other options describe potential causes or different diseases, but they don’t reflect the therapy-response framework that guides this chronic-enteropathy classification.