Detection And Analyses Of Immune Effects Of Three Main Infectious Diseases In Swine Of Xuchang Henan Province

Foot-and-month disease(FMD), porcine reproductive and respiratory syndrome(PRRS), classical swine fever(CSF) are the main infectious diseases endangering the pig industry in recent years. FMD and CSF were listed as class A diseases by OIE, and PRRS was listed as class B diseases. These three diseases are the major animal epidemic diseases for prevention and control in our country.Vaccine immunization is the most effective method for controlling CSF, PRRS and FMD. The comprehensive prevention and control measures, in which the vaccine immunization is the most important mean were taken in China. The evaluation of immune effects is mainly based on the immune antibody levels. When the antibody levels reach the corresponding titers, it can prevent corresponding pathogen infections. The detection of immune antibody levels is an important content of infectious disease detections in large-scale pig farms, and also the important basis for the plan of disease control.In this study, 732 serum samples of 15 pig farms were collected based on the actual situation of vaccine immunization for disease prevention and control in five counties of Xuchang. The immune antibody levels against CSFV, O type FMDV and PRRSV were detected and evaluated, so as to provide basic data for the prevention and control of CSF, O type FMD and PRRS in the region. The results of the survey were as follows.1. The immune effects against three main infectious diseases CSF, O type FMD and PRRS were tested in Xuchang. The results showed that the qualified rate of immune antibodies against CSFV reached 70%-93.3%, the average qualified rates were 83.2% and 79.8%, respectively, in 2014 and 2015. The qualified rate of immune antibodies against O type FMDV reached 72.2%-93.3%, the average qualified rates were 82.4% and 82%, respectively, in 2014 and 2015. The qualified rate of immune antibodies against PRRSV reached 72.2%-96.4%, the average qualified rates were 85.9% and 85.1%, respectively, in 2014 and 2015.2. The detection results of immune antibodies against three kinds of main diseases indicated that immune antibody qualified rates of CSFV, O type FMDV and PRRSV reached the national requirements, but qualified rates among counties were highly different, and the whole antibody positive rates should be improved.