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Multiple novel smaco-like viruses identified in chicken cloaca swabs

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Abstract

Viral metagenomics has been used in numerous animal virus discoveries. Recently, an unprecedented diversity of CRESS DNA viruses was identified using this method, and this has expanded our understanding of the environmental distribution and host range of CRESS DNA viruses. In this study, using an unbiased viral metagenomics approach, we investigated the fecal virome of chickens collected from two farms of Anhui Province, China. Five novel CRESS DNA viruses were obtained and characterized. The genome of the five viruses is 2,401-2,742 bp in length, containing two ORFs in the same orientation. Phylogenetic analysis indicated that all five viruses have a closer genetic relationship to smacoviruses than to other viruses in the order Cremevirales. Pairwise comparison of Rep amino acid sequences showed that these five viruses had only low amino acid sequence identity (8.9%-30.6%) to members of the family Smacoviridae, and the sequence identity among the five smaco-like viruses and other unclassified smacovirus strains was 70.3–95.8%. These findings broaden our knowledge of the genetic diversity of CRESS DNA viruses and provide a basis for classification of unclassified smacoviruses.

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Funding

This work was supported by the National Key Research and Development Programs of China (No. 2017YFC1200201), Jiangsu Provincial Key Research and Development Projects (No. BE2017693), the Independent Project of Chengdu Research Base of Giant Panda Breeding (No. 2020CPB-C11), and the Shandong Natural Resources Fund (No. ZR2019MC036).

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    Authors and Affiliations

    1. School of Medicine, Jiangsu University, 301 Xuefu Road, 212013, Zhenjiang, Jiangsu, People’s Republic of China

      Shixing Yang, Dianqi Zhang, Yuyang Zhang, Yan Wang & Wen Zhang

    2. College of Pharmacy, Heze University, 274015, Heze, Shandong, People’s Republic of China

      Zhaobin Fan & Lili Jiang

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    1. Shixing Yang
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    2. Dianqi Zhang
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    4. Zhaobin Fan
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    6. Yan Wang
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    7. Wen Zhang
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    Correspondence to Yan Wang or Wen Zhang.

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    The research reported here did not involve experimentation with human participants or animals.

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    Shixing Yang, Dianqi Zhang and Yuyang Zhang contributed equally to this work.

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    Yang, S., Zhang, D., Zhang, Y. et al. Multiple novel smaco-like viruses identified in chicken cloaca swabs. Arch Virol 167, 2703–2708 (2022). https://doi.org/10.1007/s00705-022-05577-6

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