title: Development and evaluation of an antigen-capture ELISA for detection of the UL24 antigen of the duck enteritis virus, based on a polyclonal antibody against the UL24 expression protein.
abstract: An antigen-capture enzyme-linked immunosorbent assay (AC-ELISA) method was developed for the efficient detection of the UL24 antigen of the duck enteritis virus (DEV) using polyclonal antibodies. Ducks and rabbits were immunized, respectively, with expressed UL24 recombinant protein. The IgG antibodies against UL24 from ducks and rabbits were purified and used as the capture antibodies. The specificity of the optimized AC-ELISA was evaluated by use of DEV, duck hepatitis virus (DHV), duck hepatitis B virus (DHBV), gosling plague virus (GPV), Riemerella anatipestifer (R.A.), Escherichia coli (E. coli), Pasteurella multocida (P.M.) and Salmonella Enteritidis (S.E.). Only DEV specimens yielded a specific and strong signal. The limit of the sensitivity of this method for the detection of DEV was 46 ng/100 microl. Compared with PCR and virus isolation, the rate of agreement for the detection of experimentally infected sera was 100%. A comparative test used on clinical specimens between the neutralization test and the AC-ELISA showed that the proportions of true positives and true negatives by the AC-ELISA were 0.90 and 0.67 respectively. These results indicated that the AC-ELISA approach is rapid, sensitive, and reliable for specific detection of DEV antigen.
authors.affiliation: Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan Province, China.
authors.forename: Renyong
authors.initials: R
authors.lastname: Jia
authors.forename: Anchun
authors.initials: A
authors.lastname: Cheng
authors.forename: Mingshu
authors.initials: M
authors.lastname: Wang
authors.forename: Xuefeng
authors.initials: X
authors.lastname: Qi
authors.forename: Dekang
authors.initials: D
authors.lastname: Zhu
authors.forename: Han
authors.initials: H
authors.lastname: Ge
authors.forename: Qihui
authors.initials: Q
authors.lastname: Luo
authors.forename: Fei
authors.initials: F
authors.lastname: Liu
authors.forename: Yufei
authors.initials: Y
authors.lastname: Guo
authors.forename: Xiaoyue
authors.initials: X
authors.lastname: Chen
mesh_terms: D000818:Animals; D000914:Antibodies, Viral; D000956:Antigens, Viral / Q000032:analysis*; D001715:Bird Diseases / Q000175:diagnosis*; D004372:Ducks; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods*; D006564:Herpesviridae / Q000276:immunology / Q000302:isolation & purification*; D006566:Herpesviridae Infections / Q000175:diagnosis / Q000662:veterinary*; D011817:Rabbits; D012680:Sensitivity and Specificity
chemical_list: D000914:Antibodies, Viral; D000956:Antigens, Viral