Meningoencephalitis and pneumonia caused by Pasteurella multocida in rabbits

Eight rabbits exhibited head tilt and subsequently died.At necropsy, three rabbits had crusty deposits in ears and four had reddish lungs.The main histopathological features were severe diffuse suppurative meningoencephalitis (75.0% of rabbits), fibrinopurulent pneumonia (37.5%), and otitis externa (37.5%).Pasteurella multocida (P.multocida) was isolated from brains, ears, and lungs.The capsular serogroups of the isolates were untypable.Based on histopathological features and bacterial analysis results, the rabbits were diagnosed as P. multocida infection.P. multocida infections might result in considerable economic loss in commercial rabbit production facilities in Korea.