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  • Title: Accuracy of enzyme-linked immunosorbent assays for quantification of antibodies against Aleutian mink disease virus.
    Author: Farid AH, Rupasinghe PP.
    Journal: J Virol Methods; 2016 Sep; 235():144-151. PubMed ID: 27283885.
    Abstract:
    There is a growing interest among mink ranchers to select their stock for tolerance to the Aleutian mink disease virus (AMDV). Enzyme-linked immunosorbent assays (ELISA) are used to identify mink which have low anti-AMDV antibody titres and are expected to tolerate the AMDV infection. The objective of this study was to calculate the accuracy of three ELISA systems which were performed on blood or serum of AMDV-inoculated American mink (Neovison vison) at five laboratories in Canada, USA, Finland, the Netherlands and Denmark. The accuracy was determined by comparing the ELISA results with antibody titres measured by the counter-immunoelectrophoresis (CIEP) using 10 two-fold serial dilutions of the plasma. Antibody titres of 880 black mink which were inoculated with a spleen homogenate from a naturally infected mink were measured between 16 and 176 weeks post-inoculation. Each ELISA result from every laboratory covered a wide range of antibody titres and the Spearman's rank correlation coefficients between CIEP and ELISA results from different laboratories varied between 0.41 and 0.83, indicating a low to moderate accuracy of ELISA systems for ranking mink by antibody titre. The recombinant VP2-based ELISA used in the Netherlands and Finland ranked the mink by antibody titres more accurately than did the AMDV-G-based ELISA platforms developed in Denmark and the USA, suggesting that the source of antigen was one of the factors affecting the accuracy of ELISA results. It was concluded that the ELISA systems, particularly those based on AMDV-G antigen, require further refinement to improve their accuracy for ranking mink by antibody titre.
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