规模化猪场猪瘟免疫状况调查及仔猪首免日龄的优化

为了调查规模化猪场猪瘟的免疫方案,比较及评价其免疫效果,本研究将湖北省7个规模化种猪场作为研究对象,将猪群分为经产母猪、种公猪、后备母猪、哺乳仔猪(0~30日龄)、保育仔猪(30~60日龄)和生长猪(61日龄以上)6个群体,并按各猪群5%~8%的比例采血,检测猪瘟抗体。结果表明,各猪群猪瘟免疫合格率分别为99.55%、96.43%、99.22%、89.88%、81.68%及78.64%,不同免疫方案下,各场猪群表现出不同免疫效果。而从总体上看,保育仔猪的猪瘟抗体水平是各个猪群中最为薄弱的环节。因此本研究在调查的基础上,继续探索了一个规模化猪场的仔猪猪瘟母源抗体消退规律,并且分别设置了14、21、28、35日龄猪瘟疫苗免疫组,于免疫后1周及2周后采血检测猪瘟抗体。结果表明,该场猪瘟免疫最佳首免日龄为28日龄,并根据研究结果将该场原来的首免21日龄调整到28日龄。本研究的开展对规模化猪场制定合理的猪瘟免疫方案具有较好的参考价值。

Survey of classical swine fever immunization status in pigs on large-scale pig farms and optimization of primary vaccination in piglets

In order to investigate immunization schedules of classical swine fever(CSF) in large-scale pig farms,and to evaluate the immune status,seven large-scale pig farms in Hubei province were selected.Pigs were divided into the sows,the boars,the prepubertal gilts,the breast-feeding piglets(about 0-30 days),the nursing piglets(about 31-60 days old) and the growing pigs(above 61 days old).In each herd,blood were collected from 5%-8% of pigs and antibody titers were tested.Results showed that the qualification rat...