Abstract:

To observe and record the change condition on sow’s reproductive efficiency and piglet performance before and after eliminating the breeding pigs with unqualified CSFV antibody, serum samples from three scale pig farms were collected and tested with HerdChek CSFV-ELISA kit, then the unqualified（antibody blocking rate＜50%）breeders after booster immunization were eliminated. The result showed that: after eliminating the breeding pigs with unqualified CSFV antibody, the average litter number of piglet in three pig farms (ie, A、B 、C) were increased by 0.29 (P <0.05), 0.40 (P<0.01), 0.39 (P<0.01) respectively; the average number of survival piglets were increased by 0.54 (P<0.01), 0.35 (P<0.01), 0.62 (P <0.01) respectively; the average litter number of weaned piglets were increased by 0.65 (P <0.01), 0.71 (P<0.01), 0.81 (P<0.01) respectively. The difference in weight gain of piglet at 30-60 days of age was extremely significant (P<0.01), but inconspicuousness for the swine pregnancy rate、the survival rate of weaned piglet and piglet at 30-60 days of age. The results indicated that eliminating the breeding pigs with unqualified CSFV antibody can significantly improve the performance of breeder and piglets.