Effect of Eliminated the Breeding Pigs with Unqualified CSFV Antibody on Sows＇ Reproductive Performance and Pigs＇ Growth Performance

[Objective] The aim was to explore the effect of eliminated the breeding pigs with unqualified CSFV antibody on sow＇s reproductive performance and pig＇s growth performance so as to provide a scientific basis for the eliminating of the breeding pigs with unqualified CSFV antibody in large-scale pig farms.[Method] Serum samples from three scale pig farms were collected and tested with HerdChek CSFV-ELISA kit,then provided a certain scientific basis for scale pig farm to eliminate the unqualified（antibody blocking rate50%）breeders after booster immunization.[Result ] After eliminating the breeding pigs with unqualified CSFV antibody,the average litter number of piglet in three pig farms（A,B,C）were increased by 0.29（P0.05）,0.40（P0.01）,0.39（P0.01）respectively;the average number of survival piglets were increased by 0.54（P0.01）,0.35（P0.01）,0.62（P0.01）respectively;the average litter number of weaned piglets were increased by 0.65（P0.01）,0.71（P0.01）,0.81（P0.01）respectively.The difference in weight gain of piglet at 30-60 d of age was extremely significant（P0.01）,but inconspicuousness for the swine pregnancy rate,the survival rate of weaned piglet and piglet at 30-60 d of age.[Conclusion] The eliminating the breeding pigs with unqualified CSFV antibody can significantly improve the performance of breeder and piglets.