Eosinophilic Bronchopneumopathy

Eosinophilic bronchopneumopathy is a condition in which a particular type of white blood cell—the eosinophil—accumulates in the airways and lung tissue, causing inflammation. These cells are part of the immune system and typically respond to parasites or allergens, but in this condition they gather in the lungs without an obvious trigger, leading to airway narrowing and difficulty breathing. Owners often first notice persistent coughing, increased breathing effort, or wheezing that doesn't resolve with rest. Some animals may show reduced tolerance for exercise or appear to tire more easily during walks. The signs can develop gradually over weeks or appear more suddenly, and in some cases they may seem to improve and then return. This page explores the breathing and behaviour changes that can occur, what is understood about the underlying inflammatory process, the investigations that help distinguish this condition from other causes of respiratory signs, and the treatment approaches that veterinary teams may consider.