Abstract
A monoclonal antibody (MAb) was generated against the capsid protein (ORF 72) of koi herpesvirus (KHV) isolated from diseased koi Cyprinus carpio in Taiwan. The clone of MAb-B2 was obtained by immunizing mice with whole virus particles and further identified using indirect enzyme-linked immunosorbent assay and Western blot assay. In addition, it detected KHV in KHV-infected cells but not in those of mock-infected cells as demonstrated by indirect immunofluorescence assay. The neutralization test showed that MAb-B2 neutralized KHV. Furthermore, we uncovered that MAb-B2 recognizes the ORF72 of KHV as revealed by liquid chromatography-tandem mass spectrometry and Western blot assays. Additionally, MAb-B2 has been used as a diagnostic tool for detection of KHV in clinical samples by immunohistochemistry. Collectively, our results indicated that MAb-B2 could be used in the development of a diagnostic kit for diagnosis of KHV infections and ORF72 protein of KHV might be a candidate for future vaccine development.
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