Frontiers in Microbiology (Dec 2019)

Identification of a Novel Ichthyic Parvovirus in Marine Species in Hainan Island, China

  • Jiang Du,
  • Jiang Du,
  • Jiang Du,
  • Wenqi Wang,
  • Wenqi Wang,
  • Jasper Fuk-Woo Chan,
  • Jasper Fuk-Woo Chan,
  • Jasper Fuk-Woo Chan,
  • Jasper Fuk-Woo Chan,
  • Gaoyu Wang,
  • Gaoyu Wang,
  • Yi Huang,
  • Yi Huang,
  • Yufang Yi,
  • Yufang Yi,
  • Zheng Zhu,
  • Zheng Zhu,
  • Zheng Zhu,
  • Zheng Zhu,
  • Ruoyan Peng,
  • Ruoyan Peng,
  • Xiaoyuan Hu,
  • Xiaoyuan Hu,
  • Yue Wu,
  • Yue Wu,
  • Jifeng Zeng,
  • Jifeng Zeng,
  • Jiping Zheng,
  • Xiuji Cui,
  • Xiuji Cui,
  • Xiuji Cui,
  • Lina Niu,
  • Lina Niu,
  • Lina Niu,
  • Wei Zhao,
  • Wei Zhao,
  • Wei Zhao,
  • Gang Lu,
  • Gang Lu,
  • Gang Lu,
  • Kwok-Yung Yuen,
  • Kwok-Yung Yuen,
  • Kwok-Yung Yuen,
  • Kwok-Yung Yuen,
  • Feifei Yin,
  • Feifei Yin,
  • Feifei Yin

DOI
https://doi.org/10.3389/fmicb.2019.02815
Journal volume & issue
Vol. 10

Abstract

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Parvoviruses are a diverse group of viruses that are capable of infecting a wide range of animals. In this study, we report the discovery of a novel parvovirus, tilapia parvovirus HMU-HKU, in the fecal samples of crocodiles and intestines of tilapia in Hainan Province, China. The novel parvovirus was firstly identified from crocodiles fed with tilapia using next-generation sequencing (NGS). Screening studies revealed that the prevalence of the novel parvovirus in crocodile feces samples fed on tilapia (75–86%) was apparently higher than that in crocodiles fed with chicken (4%). Further studies revealed that the prevalence of the novel parvovirus in tilapia feces samples collected at four areas in Hainan Province was between 40 and 90%. Four stains of the novel parvovirus were identified in this study based on sequence analyses of NS1 and all the four strains were found in tilapia in contrast only two of them were detected in crocodile feces. The nearly full-length genome sequence of the tilapia parvovirus HMU-HKU-1 was determined and showed less than 45.50 and 40.38% amino acid identity with other members of Parvoviridae in NS1 and VP1 genes, respectively. Phylogenetic analysis based on the complete helicase domain amino acid sequences showed that the tilapia parvovirus HMU-HKU-1 formed a relatively independent branch in the newly proposed genus Chaphamaparvovirus in the subfamily Hamaparvovirinae according to the ICTV’s most recent taxonomic criteria for Parvoviridae classification. Tilapia parvovirus HMU-HKU-1 likely represented a new species within the new genus Chaphamaparvovirus. The identification of tilapia parvovirus HMU-HKU provides further insight into the viral and genetic diversity of parvoviruses and its infections in tilapia populations need to be evaluated in terms of pathogenicity and production losses in tilapia farming.

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