Complex epidemiology of a zoonotic disease in a culturally diverse region: phylogeography of rabies virus in the Middle East

PLoS Negl Trop Dis. 2015 Mar 26;9(3):e0003569. doi: 10.1371/journal.pntd.0003569. eCollection 2015 Mar.

Abstract

The Middle East is a culturally and politically diverse region at the gateway between Europe, Africa and Asia. Spatial dynamics of the fatal zoonotic disease rabies among countries of the Middle East and surrounding regions is poorly understood. An improved understanding of virus distribution is necessary to direct control methods. Previous studies have suggested regular trans-boundary movement, but have been unable to infer direction. Here we address these issues, by investigating the evolution of 183 rabies virus isolates collected from over 20 countries between 1972 and 2014. We have undertaken a discrete phylogeographic analysis on a subset of 139 samples to infer where and when movements of rabies have occurred. We provide evidence for four genetically distinct clades with separate origins currently circulating in the Middle East and surrounding countries. Introductions of these viruses have been followed by regular and multidirectional trans-boundary movements in some parts of the region, but relative isolation in others. There is evidence for minimal regular incursion of rabies from Central and Eastern Asia. These data support current initiatives for regional collaboration that are essential for rabies elimination.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Evolution, Molecular*
  • Humans
  • Middle East / epidemiology
  • Phylogeography
  • Rabies / epidemiology*
  • Rabies virus / genetics*
  • Zoonoses / epidemiology*

Grants and funding

This work was partially supported by the UK Department for Environment and Rural Affairs (Defra ROAME SE0427), the UK Biological Engagement Program, the EU FP7-funded Research Infrastructure Grant ‘European Virus Archive (EVA)’ (grant number 228292), BMBF grant 01KI1016A “Lyssaviruses - a potential re-emerging public health threat” and by a joint United Arab Emirates University - Sultan Qaboos University Research grant entitled "Molecular characterization of selected zoonotic and emerging viruses isolated in the U.A.E. and in Oman. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.