Respiratory Symptoms of Distemper: Early Phases and Underlying Mechanisms

Respiratory symptoms of canine distemper begin 3-6 days post-infection with transient fever, nasal/ocular discharge, and a dry cough, progressing to dyspnea within 7-14 days due to epithelial inflammation and lymphopenia (a 50-80% reduction in immune defenses). Mechanisms include cellular apoptosis and a cytokine storm (TNF-α/IL-6 levels up to 5-10 times normal), with rare complications such as interstitial pneumonia (70-80% mortality rate). Early intervention reduces severity by 30-50%; support your dog with a stress-free environment for a better recovery.