[1] AFGHAH Z, WEBB B, MENG Xiangjin, et al. Ten years of PCV2 vaccines and vaccination:is eradication a possibility?[J]. Vet Microbiol, 2016, 206:21. doi:10.1016/j.vetmic.2016.10.002.
[2] CANELLI E, BORGHETTI P, FERRARI L, et al. Immune response to PCV2 vaccination in PRRSV viraemic piglets[J]. Vet Rec, 2016, 178(8):193. doi:10.1136/vr.103637.
[3] OBER R A, THISSEN J B, JAING C J, et al. Increased microbiome diversity at the time of infection is associated with improved growth rates of pigs after co-infection with porcine reproductive and respiratory syndrome virus (PRRSV) and porcine circovirus type 2(PCV2)[J]. Vet Microbiol, 2017, 208:203-211. doi:10.1016/j.vetmic.2017.06.023.
[4] FENG Hua, SEGALES J, FRAILE L, et al. Effect of high and low levels of maternally derived antibodies on porcine circovirus type 2(PCV2) infection dynamics and production parameters in PCV2 vaccinated pigs under field conditions[J]. Vaccine, 2016, 34(27):3044-3050. doi:10.1016/j.vaccine.2016.04.088.
[5] XIAO Chaoting, HALBUR P G, OPRIESSNIG T. Global molecular genetic analysis of porcine circovirus type 2(PCV2) sequences confirms the presence of four main PCV2 genotypes and reveals a rapid increase of PCV2d[J]. J Gen Virol, 2015, 96(7):1830-41. doi:10.1099/vir.0.000100.
[6] ZHANG Dan, HE Kongwang, WEN Libin, et al. Genetic and phylogenetic analysis of a new porcine circovirus type 2(PCV2) strain in China[J]. Arch Virol, 2015, 160(12):3149-3151. doi:10.1007/s00705-015-2615-8.
[7] LIU Xin, WANG Fengxue, ZHU Hongwei, et al. Phylogenetic analysis of porcine circovirus type 2(PCV2) isolates from China with high homology to PCV2c[J]. Arch Virol, 2016, 161(6):1591-1599. doi:10.1007/s00705-016-2823-x.
[8] 于静, 劳秀杰, 陈彦永, 等.猪圆环病毒2型实时荧光定量PCR检测方法的建立[J].浙江农林大学学报, 2016, 33(2):357-363.

YU Jing, LAO Xiujie, CHEN Yanyong, et al. A real-time PCR method for detection of porcine circovirus 2[J]. J Zhejiang A & F Univ, 2016, 33(2):357-363. doi:10.11833/j.issn.2095-0756.2016.02.023.
[9] WILRICH C, WILRICH P T. Estimation of the POD function and the LOD of a qualitative microbiological measurement method[J]. J AOAC Int, 2009, 92(6):1763-1772.
[10] LIU Shuqing, LI Wentao, WANG Yang, et al. Coinfection with Haemophilus parasuis serovar 4 increases the virulence of porcine circovirus type 2 in piglets[J]. Virol J, 2017, 14(1):227. doi:10.1186/s12985-017-0890-6.
[11] YANG Zongzhao, HABIB M, SHUAI Jiangbing, et al. Detection of PCV2 DNA by SYBR Green I-based quantitative PCR[J]. J Zhejiang Univ Sci B, 2007, 8(3):162-169. doi:10.1631/jzus.2007.B0162.
[12] 郑兰兰, 张君涛, 李明凤, 等.猪伪狂犬病毒与猪圆环病毒2型二重SYBR Green Ⅰ实时荧光PCR检测方法的建立[J].中国兽医学报, 2014, 34(3):366-370, 378.

ZHENG Lanlan, ZHANG Juntao, LI Mingfeng, et al. Simultaneous detection of porcine pseudorabies virus and porcine circovurs 2 by duplex real-time PCR[J]. Chin J Vet Sci, 2014, 34(3):366-370, 378.
[13] NEIRA V, RAMOS N, TAPIA R, et al. Genetic analysis of porcine circovirus type 2 from pigs affected with PMWS in Chile reveals intergenotypic recombination[J]. Virol J, 2017, 14(10):191. doi:10.1186/s12985-017-0850-1.
[14] LIU Jiankui, WEI Chuhua, DAI Ailing, et al. Detection of PCV2e strains in Southeast China[J]. Peer J, 2018, 6(14):e4476. doi:10.7717/peerj. 4476.
[15] QU Tailong, LI Runcheng, YAN Meijun, et al. High prevalence of PCV2d in Hunan Province, China:a retrospective analysis of samples collected from 2006 to 2016[J]. Arch Virol, 2018, 163(7):1897-1906. doi:10.1007/s00705-018-3823-9.