Journal Article aptamer Aptamers, Nucleotide Antiviral Agents grouper iridovirus Plant Extracts Vibrio alginolyticus antiviral effect rapid detection DNA, Single-Stranded ELASA Illicium verum Hook. f. extract Ligands Molecular Probes Research Support, Non-U.S. Gov't Viola philippica antiviral activity antiviral mechanism easy operation grass carp reovirus high-throughput screening mariculture medicinal plants ingredients pathogenesis specificity specificity and sensitivity systematic evolution of ligands by exponential enrichment