2) The colony immune defence
群体免疫屏障
4) herd immunity
[牧]群体免疫力
5) Swinery immunity
猪群免疫
6) immunity for chickens
鸡群免疫
1.
This paper makes analyzes on the professional quality of the epidemic prevention workers, the quality and selection of vaccine, the strict standard operation, and the nutrition and health of the immunity chickens in the course of immunity for chickens, expounds the reasons of the immunity failure in the hennery and puts forward the preventive countermeasures.
在鸡群免疫过程中,针对防疫人员的业务素质,疫苗质量的好坏,能否正确选择疫苗,严格规范操作以及被免疫鸡群的营养状况、健康状况等原因进行了分析,探讨了养鸡场免疫失败的原因,并提出了防制对策。
补充资料：群体免疫
群体免疫
人体对传染病的抵抗力，与环境条件和特异性免疫有一定关系。大多数个体已具备特异性免疫时，传染则不易发生。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条