Are pangolins the intermediate host of the 2019 novel coronavirus (SARS-CoV-2)?

PLoS Pathog. 2020 May 14;16(5):e1008421. doi: 10.1371/journal.ppat.1008421. eCollection 2020 May.

Abstract

The outbreak of a novel corona Virus Disease 2019 (COVID-19) in the city of Wuhan, China has resulted in more than 1.7 million laboratory confirmed cases all over the world. Recent studies showed that SARS-CoV-2 was likely originated from bats, but its intermediate hosts are still largely unknown. In this study, we assembled the complete genome of a coronavirus identified in 3 sick Malayan pangolins. The molecular and phylogenetic analyses showed that this pangolin coronavirus (pangolin-CoV-2020) is genetically related to the SARS-CoV-2 as well as a group of bat coronaviruses but do not support the SARS-CoV-2 emerged directly from the pangolin-CoV-2020. Our study suggests that pangolins are natural hosts of Betacoronaviruses. Large surveillance of coronaviruses in pangolins could improve our understanding of the spectrum of coronaviruses in pangolins. In addition to conservation of wildlife, minimizing the exposures of humans to wildlife will be important to reduce the spillover risks of coronaviruses from wild animals to humans.

MeSH terms

  • Animals
  • Betacoronavirus / classification*
  • Betacoronavirus / genetics*
  • COVID-19
  • Coronaviridae / classification
  • Coronaviridae / genetics
  • Coronavirus Infections / virology*
  • Disease Reservoirs / virology*
  • Eutheria / virology*
  • Host Specificity
  • Humans
  • Pandemics
  • Phylogeny
  • Pneumonia, Viral / virology*
  • SARS-CoV-2
  • Sequence Homology, Nucleic Acid
  • Zoonoses / prevention & control
  • Zoonoses / virology

Grants and funding

This project was supported by wildlife disease monitoring and early warning system maintenance project from National Forestry and Grassland Administration (2019072) to Chen JP, GDAS Special Project of Science and Technology Development (grant number 2020GDASYL-20200103090, 2018GDASCX-0107) to Liu P.,Guangzhou Science Technology and Innovation Commission (grant number 201804020080) to Chen JP, Natural Science Foundation of China (grant number 31972847) to Jiang JZ, Guangzhou science and technology project (grant number 2019001) to Chen JP. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.