| viruses in unexplained encephalitis cases in american black bears (ursus americanus). | viral infections were investigated in american black bears (ursus americanus) from nevada and northern california with and without idiopathic encephalitis. metagenomics analyses of tissue pools revealed novel viruses in the genera circoviridae, parvoviridae, anelloviridae, polyomaviridae, and papillomaviridae. the circovirus and parvovirus were of particular interest due to their potential importance as pathogens. we characterized the genomes of these viruses and subsequently screened bears by p ... | 2020 | 33332429 |