title: Assessing PCV2 antibodies in field pigs vaccinated with different porcine circovirus 2 vaccines using two commercial ELISA systems.
abstract: Porcine circovirus type 2 (PCV2) is the primary causative agent for post-weaning, multisystemic, wasting syndrome. Consequently, serologic detection of and vaccination against PCV2 are important for the swine industry. Among several serological tests, the enzyme-linked immunosorbent assay (ELISA) is commonly used to measure anti-PCV2 antibody levels. In the present study, we used two commercial ELISA systems to comparatively evaluate anti-PCV2 antibodies in field pigs treated with three different PCV2 vaccines. Among a total of 517 serum samples, the results of the two ELISAs were fully concordant for 365 positive and 42 negative samples, indicating 78.7% agreement. In addition, the Pearson coefficient (0.636) indicated a moderate correlation between data from the two ELISAs. Results from the farms with pigs vaccinated with the three different PCV2 vaccines demonstrated that most of the vaccinated animals underwent seroconversion. However, the increase and duration of antibody titers varied depending on the vaccine, the presence of maternal antibodies, and the vaccination program. PCV2 serologic status and anti-PCV2 antibody levels of herds from this study could be utilized to determine the best timing for vaccination and assessing vaccination compliance.
authors.affiliation: Department of Infectious Diseases, College of Veterinary Medicine, Seoul National University, Seoul 151-742, Korea.
authors.forename: Min-Kyoung
authors.initials: MK
authors.lastname: Shin
authors.forename: Seung Hyun
authors.initials: SH
authors.lastname: Yoon
authors.forename: Myung Hwui
authors.initials: MH
authors.lastname: Kim
authors.forename: Young Soo
authors.initials: YS
authors.lastname: Lyoo
authors.forename: Seung Won
authors.initials: SW
authors.lastname: Suh
authors.forename: Han Sang
authors.initials: HS
authors.lastname: Yoo
mesh_terms: D000375:Aging; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood*; D017925:Circovirus / Q000145:classification* / Q000276:immunology; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods / Q000662:veterinary*; D005260:Female; D053570:Porcine Postweaning Multisystemic Wasting Syndrome / Q000097:blood / Q000276:immunology / Q000517:prevention & control*; D056910:Republic of Korea / Q000453:epidemiology; D013552:Swine; D013553:Swine Diseases / Q000517:prevention & control* / Q000821:virology; D014765:Viral Vaccines / Q000276:immunology*
chemical_list: D000914:Antibodies, Viral; D014765:Viral Vaccines
keywords: enzyme-linked immunosorbent assay; pigs; porcine circovirus 2; serology