集団肥育豚群の呼吸器病に関わる病原の検索

Abstract

A survey was conducted on respiratory diseases among introduced fattening pigs, by utilizing decoy pigs, on a large farm in Osaka from 1978 to 1979. Fattening pigs began to show severe respiratory signs soon after introduction and be condemned a week after introduction. The rate of condemnation reached 28.2% for the first three weeks of survey. Pleuropneumonia was observed in most of the decoy pigs. Many species of bacteria were isolated from the respiratory tract and Haemophilus (Actinobacillus) pleuropneumoniae was isolated purely from the lungs of some decoy pigs. The rate of condemnation was reduced to 10.1% in the fourth weeks of survey.Autopsy revealed bronchopneumonia and peribronchitis in some decoy pigs.Many strains of porcine enteroviruses, porcine parvoviruses and swine influenza viruses were isolated from the respiratory tracts of some decoy pigs.