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. 2011 Dec;17(12):2287–2293. doi: 10.3201/eid1712.110967

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Phylogenetic trees constructed on the partial (245 aa) RNA-dependent RNA polymerase (panel A, RdRp) (open reading frame [ORF] 1b) and the full-length capsid precursor (panel B, ORF2) amino acid sequences. Black circles indicate strain identified in this study. The trees were constructed by using a selection of astrovirus (AstV) strains. Country names are abbreviated. Scale bars indicate the number of amino acid substitutions per 100 residues. Bootstrap values <90% are not shown. CSL, California sea lion; ANV, avian nephritis virus.