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Duck astrovirus (DAstV) is an important pathogen causing duck viral hepatitis (DVH), a highly contagious and fatal disease in young ducklings. To provide an antigen for a diagnostic serum test, the C-terminus of DAstV ORF2 protein was expressed in Escherichia coli. Four positive and 30 negative sera were used to validate the purified ORF2 protein by developing an indirect enzyme-linked immunosorbent...
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