The chronic form of bronchitis is a constantly repeated inflammation of the bronchial mucosa with purulent mucus formation. In addition, there is an increase in the circumference of the mucous membrane and, not infrequently, severe attacks of shortness of breath.
The inflammation of the mucous membrane caused by various agents destroys the ciliated epithelium (epithelium that lines most of the airways) over time. These are replaced by other epithelial cells and inflammatory cells, which causes the bronchial lumen to shrink. In addition, the epithelium loses its ability to clean itself and bacteria and allergens easily find their way into the damaged tissue. The secretion water is absorbed and a tough mucus forms in the bronchi. As a result, the airways are narrowed and so-called marginal emphyses (places where there is a lot of air) and collapsed lung sections as a result of lack of oxygen occur.
Most acute bronchitis develops into a chronic form. The symptoms rarely come on slowly. Mainly small to medium-sized and overweight middle-aged to older dogs are affected. The four-legged friends suffer from a cough, which starts especially after physical activity and has existed for a long time. Sometimes it comes to a tough sputum and shortness of breath. Breathing noises can also be detected. Chronic bronchitis, if left untreated, can develop into asthma.
Acute bronchitis, laryngitis, upper airway obstruction, pneumonia, rhinitis, tracheitis