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. 2018 Jan 15;15(1):11.
doi: 10.1186/s12985-018-0923-9.

Plasma virome of cattle from forest region revealed diverse small circular ssDNA viral genomes

Affiliations

Plasma virome of cattle from forest region revealed diverse small circular ssDNA viral genomes

Hao Wang et al. Virol J. .

Abstract

Background: Free-range cattle are common in the Northeast China area, which have close contact with farmers and may carry virus threatening to cattle and farmers.

Methods: Using viral metagenomics we analyzed the virome in plasma samples collected from 80 cattle from the forested region of Northeast China.

Results: The virome of cattle plasma is composed of the viruses belonging to the families including Parvoviridae, Papillomaviridae, Picobirnaviridae, and divergent viral genomes showing sequence similarity to circular Rep-encoding single stranded (CRESS) DNA viruses. Five such CRESS-DNA genomes were full characterized, with Rep sequences related to circovirus and gemycircularvirus. Three bovine parvoviruses belonging to two different genera were also characterized.

Conclusion: The virome in plasma samples of cattle from the forested region of Northeast China was revealed, which further characterized the diversity of viruses in cattle plasma.

Keywords: CRESS-DNA virus; Cattle blood; Parvovirus; Virome.

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Competing interests

The authors declare that they have no competing interests.

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Figures

Fig. 1
Fig. 1
The genomic organization of the five CRESS-DNA viruses identified in the cattle blood samples
Fig. 2
Fig. 2
Phylogenetic analysis of the five CRESS-DNA viruses identified in the cattle blood samples. Phylogenetic analysis was performed based on the amino acid sequence of Rep protein. The sequence alignments included five CRESS-DNA viruses identified in the cattle blood samples in this study, their best BLASTp matches in GenBank based on the Rep proteins, and the representative strains of circovirus, cyclovirus, and gemycircularvirus. Host or sources of the closely related viruses of the five CRESS-DNA viruses in this study in the phylogenetic analysis were showed on branches. Viruses identified in this study were labeled with black dots
Fig. 3
Fig. 3
The genomic organization of the three BPVs and phylogenetic trees based on the nonstructural (NS) and VP1 proteins, respectively. a The genomic organization of the three BPVs identified in the cattle blood samples. b and (c) Phylogenetic analysis based on the amino acid sequence of NS and VP proteins, respectively. The sequence alignments included three BPVs identified in the cattle blood samples in this study, their best BLASTp matches in GenBank, and the representative members of the related genera in family Parvoviridae. Viruses identified in this study were labeled with black dots

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