Abstract: Calf pneumonia generally refers to inflammation caused by the lung infection of calves and is one of the common diseases of calves. The lobular pneumonia is the most common disease in calves within 2 months of age. The main cause of calf pneumonia is the invasion of pathogenic microorganisms. Irritation of adverse factors,blood infection,secondary to some diseases and inhalation of foreign bodies are common causes. The main clinical symptoms are relaxation fever or intermittent fever,pulmonary auscultation with crackling and rales,pulmonary percussion with focal dullness area,cough,accelerated breathing,dyspnea and so on. The emphasis of prevention is to protect calves,avoid the invasion of exogenous pathogenic microorganisms,and inhibit the proliferation of endogenous pathogenic microorganisms. The treatment focuses on antibacterial and anti-inflammatory, preventing exudation,promoting absorption,relieving cough and expectorating phlegm,antibiotics should be used to avoid drug resistance,drug use according to the course of treatment,combination of Chinese and Western medicine,and symptomatic and causal treatment.

Key words: calf pneumonia, etiology, pathogenesis, clinical symptoms, treatment