规模化猪场仔猪口蹄疫免疫程序的制定

本试验通过研究免疫状况良好的母猪群所产仔猪母源抗体的获得方式,仔猪体内母源抗体的持续时间,仔猪不同免疫程序的免疫效果,发现初生仔猪遵守被动免疫传递规律,仔猪体内的口蹄疫抗体水平也有自己的消长规律:哺乳后3～7d抗体水平达到最高,35日龄后开始下降,63日龄左右抗体保护率已经低于60%。所以,仔猪口蹄疫疫苗首次免疫的时间应定在35日龄,49日龄还需加强一次;疫苗的剂量:首免为1头份(2mL),加强时为2头份(3mL)。

The establishment on immunization program of piglets aftosa in large-scale pig farm

In order to determine the piglets immunization program about scale pig farm in Liangshan, we studied the way received maternal antibodies of piglets which came from sows with strong immunity, the duration of maternal antibodies in pigs in vivo, and the immune effects on different immunization program. The results showed that newborn piglets complied with passive immunity transfer law, its aftosa antibody levels in piglets had the laws of growth and decline： classical aftosa antibody levels were highest in breast-feeding after 3-7 days, after weaning （35 days）, it declined rapidly, and about 63 days-old, the antibody protection rate had less than 60%. Theretbre, the first time using aftosa vaccine should be set at 35 days, 49 days needed to be strengthened once more; the vaccine doses were following： the first dose was 2 mL, the enhanced dose was 3 mL.