MERS-CoV spillover at the camel-human interface

Gytis Dudas, Luiz Max Carvalho, Andrew Rambaut, Trevor Bedford

Research output: Contribution to journalArticlepeer-review

Abstract

Middle East respiratory syndrome coronavirus (MERS-CoV) is a zoonotic virus from camels causing significant mortality and morbidity in humans in the Arabian Peninsula. The epidemiology of the virus remains poorly understood, and while case-based and seroepidemiological studies have been employed extensively throughout the epidemic, viral sequence data have not been utilised to their full potential. Here, we use existing MERS-CoV sequence data to explore its phylodynamics in two of its known major hosts, humans and camels. We employ structured coalescent models to show that long-term MERS-CoV evolution occurs exclusively in camels, whereas humans act as a transient, and ultimately terminal host. By analysing the distribution of human outbreak cluster sizes and zoonotic introduction times, we show that human outbreaks in the Arabian peninsula are driven by seasonally varying zoonotic transfer of viruses from camels. Without heretofore unseen evolution of host tropism, MERS-CoV is unlikely to become endemic in humans.

Original languageEnglish
Number of pages22
JournaleLIFE
Volume7
DOIs
Publication statusPublished - 16 Jan 2018

Keywords

  • MERS
  • coronavirus
  • epidemiology
  • evolutionary biology
  • genomics
  • global health
  • phylodynamics
  • phylogenetics
  • structured coalescent
  • virus
  • zoonosis

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