16. 高健康技术和疾病的根除PPT.ppt

仔猪用药 母猪免疫 隔离距离 疾病 成功 失败 断奶日龄 较大 较小 Partial Depopulation 部分空群 When to apply 应用时机 - Justify obvious production losses e.g. Mortality, growth rate, non-marketable pigs 确证有明显的生产损失 如死亡率、生长速率、无市场价值猪 - Identify obvious age group with problem PRRS: 6-10 wks, chronic TGE: 2-4 wks 发现某个年龄段的猪明显有问题 如蓝耳病：6－10周龄、慢性猪传染性胃肠炎：2-4周龄 What to prepare 准备什么 - Seroprofiling data of each problem pathogen 各导致问题病原的血清学曲线数据 - Plan ahead to less interrupt production flow 先作好计划以减少对生产流程的中断 - Warmer seasons 在温暖的季节进行 - Available off-site facility 启用场外设施 - Stop mate for a designated period 有计划地中断配种一段时间 Nursery is infection circus 保育舍是感染的温床 No or little maternal antibodies for nursery pigs 保育猪母源抗体消失或低下 Mixed by many different litters 许多不同窝仔猪的混群 Weaning stress 断奶应激 - Need AI/AO by air space 需要全进/全出的通风空间 - 7 days age spread/group 低于7日龄的猪应散养 /同窝饲养 - Bio-security by group 保育群的生物安全措施 Nursery Depopulation 保育阶段清群 Many important pathogens infect pigs during 6-10 wks age as lack of maternal antibodies to PRRS, PRV, APP, AR, mycoplasma, HCV etc 许多重要的病原侵犯仔猪，在6-10周龄仔猪缺乏对抗蓝耳病、伪狂犬、传染性胸膜肺炎 、萎鼻、支原体、猪瘟病毒等的母源抗体 Break chains of infection for incoming nursery pigs from older infected or carrier pigs 打断从感染猪、带毒猪身上感染引入保育猪传播途径 Depopulate the nursery pens or buildings 保育舍或猪舍清群 Clean, disinfect, disinfect dry at least for 2 week 清洁、消毒，之后再消毒并干燥至少2周 Routinely once a year during warmer seasons to improve overall health level 每年在较温暖的季节进行一次，以提高全场的健康水平 Characteristics of recurrent PRRS nursery problem 保育猪中存在蓝耳病持续感染问题的特征 Long term suboptimal daily gain – ADG up to 15% less 长期日增重未达标——平均日增重减少15％ Higher feed to gain (FE) ratio 需要更多饲料达到增重率（降低饲料效率） Post-weaning mortality up to 15% - 2× pre- PRRS level 断奶后死亡率高达15％-2倍于 蓝耳病感染前水平 High secondary infectio