The most common, widespread epidemic, clinical manifestations of rhinitis and bronchial pneumonia; the main lesion after death is pulmonary abscess. [pathogen] The pathogen of the disease is Borrelia bronchiseptica, gram-negative, methylene blue staining is often stained with two poles, flagella, do not form spores, strict oxygen bacteria. The bacteria's resistance is not strong, the general disinfection drugs can kill. The bacteria are often parasitized in the respiratory tract of rabbits, the nasal cavity and secretions of diseased rabbits, and diseased organs. Its route of transmission is mainly through respiratory infections, and is often associated with Pasteurellosis and Listeriosis. In spring and autumn, when parasites invade, sudden changes in climate, colds, and environmental changes, the body's resistance is reduced or dust and certain gases are easily irritated. [Symptoms] characterized by rhinitis and bronchopneumonia. Rhinitis type: Mostly endemic, with serous or mucilaginous rhinorrhea out of the nostrils, congestion of the mucous membranes of the nasal cavity, and with serous fluid and mucus. Shorter course of illness, easy to recover. Bronchial pneumonia type: rare, chronic sporadic. Rabbits with mucus or purulent discharge from the nostrils have long-term unhealed, and if the nostrils form clogged moults, they cause dyspnea; loss of appetite and gradual weight loss. The disease can reach up to 2 months. [pathological changes] Bronchial pneumonia type: visible tracheal and bronchial mucosal hyperemia, with foamy mucus or a small amount of thin pus; lungs have sesame or pigeon eggs ranging in size, the number of gray pustules, sputum, milky white Pus, with a thick and elastic envelope, some of the lungs emphysema; some liver with large soy beans or beans. [Diagnosis] 1. According to the clinical symptoms and pathological changes, especially the lung abscess can be initially diagnosed. 2. Further diagnosis can be used for bacteriological examination. The pus of the lung abscess was directly smeared and stained with methylene blue. It was found that there were many morphological and bipolar stained bacilli. When necessary, bacterial culture, biochemical reactions, and animal inoculation can be performed. [Prevention and control] Strengthen feeding and management, eliminate unfavorable factors that reduce the resistance of rabbits, and find out that the diseased rabbit is isolated and treated or eliminated in time, and do thorough disinfection work. Rabbits with a history of disease can be prevented by Bordetella hydroxide aldehyde formaldehyde vaccine twice a year. For rhinitis type rabbits, sulfa drugs and chloramphenicol, kanamycin and other antibiotics can be used for treatment. China Agricultural Network Editor