Epidemiological survey of porcine pseudorabies in Guangxi from 2013 to 2016

ObjectiveThe purpose of this study was to fully study the epidemic characteristics of porcine pseudorabies virus(PRV)in Guangxi to provide a scientific basis for prevention and control of porcine pseudorabies.MethodFrom June,2013 to August,2016,473 suspected PRV positive tissue samples and 5041 suspected PRV positive serum samples were collected from pig farms of different scales in 12 cities in Guangxi. The pathogen of porcine pseudorabies and wild virus antibody in tissue and serum samples were detected by PCR and enzyme-linked immunosorbent assay(ELISA)re-spectively.ResultPositive rate for PRV of tissue and serum samples collected from scale pig farms in Guangxi were 26.43%and 24.50%respectively,and the positive rate of wild virus pathogen in tissue samples was basically consistent with that of PRV antibody in serum samples. The lowest positive rate for PRV occurred in 2015,while the highest in 2016. In Guangxi,PRV could be detected in all seasons,and the positive rate for PRV pathogen in tissue samples and that of antibody in serum samples were the lowest in the third quarter(autumn),which were 19.80%and 14.95%respec-tively. PRV could be detected in samples collected fromten out of the twelve cities in Guangxi,except Wuzhou and Fangchenggang,indicating that PRV infection was prevalent in scale pig farms in Guangxi,with Nanning,Yulin,Beihai and Guilin more serious.ConclusionPRV infection is commonin scale pig farms in Guangxi,and positive rate for PRV obviously increases in 2016,which requires intensified efforts to prevent and control PRV in areas where pig industry is developed,and real-time monitoring on PRV epidemiological trend to avoid mixed infection and do a good job in purifica-tion.