PMID- 23871220 OWN - NLM STAT- MEDLINE DCOM- 20131106 LR - 20191210 IS - 1096-0341 (Electronic) IS - 0042-6822 (Linking) VI - 444 IP - 1-2 DP - 2013 Sep TI - Development and application of a blocking enzyme-linked immunosorbent assay (ELISA) to differentiate antibodies against live and inactivated porcine reproductive and respiratory syndrome virus. PG - 310-6 LID - S0042-6822(13)00397-8 [pii] LID - 10.1016/j.virol.2013.06.027 [doi] AB - The aim of this study was to establish a method that could differentiate antibodies against live and inactivated vaccines of porcine reproductive and respiratory syndrome virus (PRRSV). A blocking ELISA (b-ELISA) was established using the PRRSV non-structural protein, Nsp9, as the antigen and a monoclonal antibody, 2D6, against the Nsp9 protein as the capture antibody. The test was validated by using 415 clinical sera in the b-ELISA compared to a commercial kit based on the indirect ELISA using the nucleocapsid (N) protein as antigen. Significant differences were observed for the data obtained by the two detection methods. This may be due to the commercial kit detecting antibodies elicited by live and inactivated virus, whereas the b-ELISA only detects antibodies produced by any active viral replication, such as natural infection or live vaccination. Therefore, the b-ELISA in this study is able to distinguish between antibodies against live and inactivated viruses in pigs. CI - Copyright (c) 2013 Elsevier Inc. All rights reserved. FAU - Cong, Yanlong AU - Cong Y AD - College of Veterinary Medicine, Jilin University, Changchun 130062, PR China. FAU - Huang, Zhiqiang AU - Huang Z FAU - Sun, Yixue AU - Sun Y FAU - Ran, Wei AU - Ran W FAU - Zhu, Lisai AU - Zhu L FAU - Yang, Guilian AU - Yang G FAU - Ding, Xuemei AU - Ding X FAU - Yang, Zhanqing AU - Yang Z FAU - Huang, Xiao AU - Huang X FAU - Wang, Chunfeng AU - Wang C FAU - Ding, Zhuang AU - Ding Z LA - eng SI - GENBANK/KF049009 PT - Journal Article PT - Validation Study DEP - 20130718 PL - United States TA - Virology JT - Virology JID - 0110674 RN - 0 (Antibodies, Monoclonal) RN - 0 (Antibodies, Viral) RN - 0 (Vaccines, Attenuated) RN - 0 (Vaccines, Inactivated) RN - 0 (Viral Nonstructural Proteins) RN - 0 (Viral Vaccines) SB - IM MH - Animals MH - Antibodies, Monoclonal/immunology MH - Antibodies, Viral/*blood/immunology MH - Enzyme-Linked Immunosorbent Assay/methods MH - Female MH - Mice MH - Mice, Inbred BALB C MH - Molecular Sequence Data MH - Porcine respiratory and reproductive syndrome virus/classification/*immunology MH - Sequence Analysis, DNA MH - Swine MH - Vaccines, Attenuated/administration & dosage/immunology MH - Vaccines, Inactivated/administration & dosage/immunology MH - Viral Nonstructural Proteins/immunology MH - Viral Vaccines/administration & dosage/*immunology OTO - NOTNLM OT - Blocking ELISA OT - Monoclonal antibodies OT - Nsp9 OT - PRRSV EDAT- 2013/07/23 06:00 MHDA- 2013/11/07 06:00 CRDT- 2013/07/23 06:00 PHST- 2013/04/11 00:00 [received] PHST- 2013/05/04 00:00 [revised] PHST- 2013/06/25 00:00 [accepted] PHST- 2013/07/23 06:00 [entrez] PHST- 2013/07/23 06:00 [pubmed] PHST- 2013/11/07 06:00 [medline] AID - S0042-6822(13)00397-8 [pii] AID - 10.1016/j.virol.2013.06.027 [doi] PST - ppublish SO - Virology. 2013 Sep;444(1-2):310-6. doi: 10.1016/j.virol.2013.06.027. Epub 2013 Jul 18.