北方大型正压空气过滤母猪场健康管理实践赵康宁.pdf

1、北方大型正压空气过滤母猪场健康管理实践Health Management Practice in Large Breeding Herd with Positive Air Filtration System in Northern China赵康宁 Zhao Kangning环山集团养猪事业部健康管理部Huanshan Group目录u气溶胶传播猪病与空气过滤系统Aerosol Transmission Swine Disease and Air Filtration Systemu大型母猪场引种建群案例 Case:Large Breeding Herd Start Upu结论与讨论 Con

2、clusion and Discussion目录u气溶胶传播猪病与空气过滤系统Aerosol Transmission Swine Disease and Air Filtration Systemu大型母猪场引种建群案例 Case:Large Breeding Herd Start Upu结论与讨论 Conclusion and Discussion1981年3月4日法国布列塔尼地区发生一系列口蹄疫案例，英国的流行病学专家根据当时的气象条件推断由布列塔尼地区很可能会通过海峡群岛传播到英国南部地区，1981年3月19日在泽西岛，3月22日在怀特岛发生了口蹄疫，由该案例推断出当跨越大面积水域跨越

3、大面积水域的时候，气溶胶的传播距离会拉长，本案例中长达250km250km。跨越英法海峡的传播神秘的3km病 Numerous studies considered the impact of biosecurity measures on the probability of becoming infected or not with a given pathogen.It is believed that in herds following strict biosecurity rules(e.g.SPF,Minimal Disease),the likelihood of becomi

4、ng infected because of people,trucks,fomites,rodents,birds or other types of indirect transmission means is reduced.In situations where there seems to be little difference between herds following strict biosecurity rules and others,the logical explanation should be that factors not affected by these

5、 rules are responsible for the infection.Air could certainly be one such factor,and several studies on some of the potential airborne pathogens discussed above found that a high level of biosecurity did not allow herds to avoid infection.通常认为采用严格生物安全管理的猪群（例如SPF猪群）由于人员，车辆，物资，老鼠，鸟或其他间接传播方式感染疾病的风险是低的。如

6、果猪群都遵守严格的生物安全原则还是发病，那么合理的解释就是导致猪群发病的不是以上流程的管控。空气，理所当然的是其中一个因素，很多关于潜在气溶胶传播（蓝耳，伪狂犬，流感，支原体，传胸，猪呼吸道冠状病毒）的病原的研究表明即使是生物安全等级很高的猪场也无法避免猪群感染。Strk reported that long-distance transport and survival of airborne pathogens are favored by cool,damp,calm conditions in the absence of sunlight over flat,vegetation-f