Replication and shedding of MERS-CoV in Jamaican fruit bats (Artibeus jamaicensis)

Sci Rep. 2016 Feb 22:6:21878. doi: 10.1038/srep21878.

Abstract

The emergence of Middle East respiratory syndrome coronavirus (MERS-CoV) highlights the zoonotic potential of Betacoronaviruses. Investigations into the origin of MERS-CoV have focused on two potential reservoirs: bats and camels. Here, we investigated the role of bats as a potential reservoir for MERS-CoV. In vitro, the MERS-CoV spike glycoprotein interacted with Jamaican fruit bat (Artibeus jamaicensis) dipeptidyl peptidase 4 (DPP4) receptor and MERS-CoV replicated efficiently in Jamaican fruit bat cells, suggesting there is no restriction at the receptor or cellular level for MERS-CoV. To shed light on the intrinsic host-virus relationship, we inoculated 10 Jamaican fruit bats with MERS-CoV. Although all bats showed evidence of infection, none of the bats showed clinical signs of disease. Virus shedding was detected in the respiratory and intestinal tract for up to 9 days. MERS-CoV replicated transiently in the respiratory and, to a lesser extent, the intestinal tracts and internal organs; with limited histopathological changes observed only in the lungs. Analysis of the innate gene expression in the lungs showed a moderate, transient induction of expression. Our results indicate that MERS-CoV maintains the ability to replicate in bats without clinical signs of disease, supporting the general hypothesis of bats as ancestral reservoirs for MERS-CoV.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, N.I.H., Intramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antibodies, Viral / blood
  • Chiroptera / virology
  • Chlorocebus aethiops
  • Coronavirus Infections / blood
  • Coronavirus Infections / immunology
  • Coronavirus Infections / veterinary*
  • Coronavirus Infections / virology
  • Cricetinae
  • Dipeptidyl Peptidase 4 / metabolism
  • Immunity, Innate
  • Lung / pathology
  • Lung / virology
  • Middle East Respiratory Syndrome Coronavirus / physiology*
  • Receptors, Virus / metabolism
  • Vero Cells
  • Viral Load
  • Virus Replication*
  • Virus Shedding*

Substances

  • Antibodies, Viral
  • Receptors, Virus
  • Dipeptidyl Peptidase 4