在猪圆环病毒和繁殖与呼吸综合症背后的隐藏因素.pdf

The hidden factor behind CIRCO VIRUS AND PRRS 在圆环病毒和猪繁殖与呼吸综合症 背后的隐藏因素 SPECIAL NUTRIENTS INC 美国特殊营养品公司 The mycotoxin specialist 霉菌毒素专家 报告人: FERNANDO TAMAMES III SIMILARITIES BETWEEN PRRS AND PCV2 (PMWS) 支气管肺炎 免疫功能变化 损坏肺泡的巨噬细胞 猪繁殖与呼吸综合症病毒 猪繁殖与呼吸综合症病毒 猪圆环病毒2型 猪圆环病毒2型 PRRS SYPMTOMS 猪繁殖与呼吸综合症症状 Coughing and respiratory signs, Increase in respiratory infections Mummified piglets. 10-15% may die in the last 3-4 weeks of pregnancy. 咳嗽和呼吸征兆, 增加感染免疫力差的仔猪的呼吸系统。怀孕最后3-4周死亡 率可达10-15%. Stillbirth levels increase up to 30%.死胎率会达到30% Very weak piglets at birth.初生仔猪非常虚弱。 Abortions, often late term, may occur at a 1-6% level. These are often the first signs to be noted. 流产（常常在晚期）率可在 1-6%之间，这些常常是最初的征兆。 Transient discoloration (blueing) of the ears may be seen (2% level. Blue ear disease). 可发现短暂的耳朵变色（蓝色）(2%水平，蓝耳病)。 Increased returns occur 21-35 days post-service.增加21-35天返情的发生 Prolonged anoestrus and delayed returns to heat post-weaning. 延长间情期和推迟断奶后返情。 More diarrhea. 增加腹泻的发生。 Less viable piglets. 仔猪存活率低 PPRS LESSIONS 猪繁殖与呼吸综合症对脏器的损害 Macro lesions 宏观病变 Micro lesions 微观病变 Laboratory investigation of PRRS virus infection in three swine herds 实验室研究猪繁殖与呼吸综合症(PRRS)病毒在三个猪群的传染情况 D. Zeman, R. Neiger, M. Yaeger, E. Nelson, D. Benfield, P. Leslie-Steen, J. Thomson, D. Miskimins, R. Daly, M. Minehart However, caution should be exercised before blaming PRRS v