The Serological Investigation, Pathogen Separation And Identification Of Porcine Contagious Pleuropneumoniae In Henan Province

Porcine contagious pleuropneumonia (PCP) is a highly contagious and fatal respiratory disease, which is caused by the bacterium Actinobacillus pleuropneumoniae (APP). The main features of acute and subacute of this disease are extensive hemorrhage, fibrin deposition in the lungs. For chronically infected animals, the main features are fibrin deposition and tissue lesion. Pigs of different ages and sexs were susceptible to the disease and the mortality rate could reach 5% -30%.In this study, 687 serum samples which were not used pleuro-pneumonia vaccine on some large-scale pig farms from Luoyang, Pingdingshan, Zhengzhou, Jiaozuo, Xinyang area of Henan province were detected for pleuropneumonia antibody by indirect hemagglutination test. From judgement standard (over l : 8 can be seen positive sample), it is found that the positive rate of sows, weaned pigs and finishing pigs were 51.58%, 25.73% and 28.08%, respectively, and the total positive rate could reach 34.93% (240/687 ). In April 2006, there was a swine infection disease outbreak in Zhoukou City and its clinical features were temperature rising and breathing difficulties. According to the results of laboratory diagnosis, it was made sure that the infection disease was porcine contagious pleuropneumonia. This experiment has established the theory and the practice foundation for scale pig farms of Henan Province to control contagious pleuropneumonia.