Abstract
We characterized the genome of a densovirus, tentatively called human CSF-associated densovirus 1 (HuCSFDV1), in cerebrospinal fluid (CSF) from a human case of encephalitis with antibodies against the N-methyl D-aspartate receptor. The presence of the viral genome in CSF was independently confirmed. This virus, which is proposed to be a member of a new species in the genus Iteradensovirus of the subfamily Densovirinae, showed the typical two ORFs encoding nonstructural and structural proteins with low-level identities of 22 and 16 % to the closest known densovirus relative. No other eukaryotic viral sequences were detected using deep sequencing. The replication and pathogenicity in humans of this virus, which belongs to a viral subfamily whose members are only known to replicate in invertebrates, remain to be demonstrated. Alternative explanations for the detection of densovirus DNA in CSF are discussed.
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Acknowledgments
We acknowledge NHLBI Grant R01 HL105770 to E.L.D, the Blood Systems Research Institute, and NIH/NCATS Colorado CTSA Grant Number UL1 TR001082 for support. The contents are the authors’ sole responsibility and do not necessarily represent official NIH views.
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This study was funded by NHLBI Grant R01 HL105770 and NIH/NCATS Colorado CTSA Grant Number UL1 TR001082.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Phan, T.G., Messacar, K., Dominguez, S.R. et al. A new densovirus in cerebrospinal fluid from a case of anti-NMDA-receptor encephalitis. Arch Virol 161, 3231–3235 (2016). https://doi.org/10.1007/s00705-016-3002-9
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DOI: https://doi.org/10.1007/s00705-016-3002-9