猪圆环病毒2型和猪繁殖与呼吸综合征病毒混合感染的流行病学调查

摘要

The research was to study the epidemiology of co-infection of porcine circovirus type 2 and Porcine reproductive and respiratory syndrome virus in parts of China during 2009 -2010. A total of 227 tissue and serum samples of diseased pigs obtained from Jiangsu,Anhui,Shanghai,Shandong,Zhejiang,Fujian and Jiangxi provinces of China during 2009 -2010 were detected for PCV2 and PRRSV by PCR or RT-PCR. The results showed that the positive rate of PCV2a,PCV2b and PRRSV were 15.9% ,44. 5% and 45. 8% respectively. 17 samples were positive for PCV2a and PRRSV,50 samples were positive for PCV2b and PRRSV, 10 samples were positive for PCV2a, PCV2b and PRRSV,and the corresponding co-infection rate were 7.5% ,22.0% and 4.4% respectively. All these results indicated that the PCV2 and PRRSV infection were widespread and co-infection of PCV2 and PRRSV was prevalent in parts of China during 2009 -2010. The high co-infection rate also increased the difficulty of prevention and controlling diseases of swine.%研究2009-2010年我国部分地区猪圆环病毒2型(PCV2)和猪繁殖与呼吸综合征病毒(PRRSV)混合感染的情况.采用PCR和RT-PCR方法对采集自我国安徽、江苏、山东、浙江等7省的227份组织和血清样品进行PCV2和PRRSV检测.PCV2a感染率为15.9％,PCV2b感染率为44.5％,PRRSV感染率为45.8％,其中17份样品表现为PCV2a和PRRSV的混合感染,50份样品表现为PCV2b和PRRSV的混合感染,10份样品表现为PCV2a,PCV2b和PRRSV的混合感染,分别占样品总数的7.5％,22.0％和4.4％.猪群中PCV2和PRRSV的感染比较普遍,混合感染率也较高,加重了疫病防控的难度.