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Figure 1 Regions of DAstV -1 infection outbreak in China. The provinces affected with DAstV -1 infection were indicated in grey.
Figure 2 Phylogenetic relationship analysis based on nucleotide sequences of ORF1a, ORF1b and ORF2 of the DAstV-SDZZ strain (●) and other AstVs. The trees were generated using MEGA 7.0 software and the Neighbor-joining method with 1000 bootstrap replicates. The DAstV -SDZZ isolate determined in this work is indicated by a red dot.
Figure 3 Histopathological changes in experimentally infected ducklings with DAstV-SDZZ strain. A Petechial and ecchymosis hemorrhages in liver. B Severe hemorrhage and swellings of kidneys. C Steatosis and infiltration of inflammatory cells of livers. D Necrosis and degeneration of renal epithelial cells, accompanied by infiltration of inflammatory cells and severe haemorrhage.