Declaring a Tuberculosis Outbreak Over With Genomic Epidemiology

Microb Genom. 2016 May 31;2(5):e000060. doi: 10.1099/mgen.0.000060. eCollection 2016 May.

Abstract

We report an updated method for inferring the time at which an infectious disease was transmitted between persons from a time-labelled pathogen genome phylogeny. We applied the method to 48 Mycobacterium tuberculosis genomes as part of a real-time public health outbreak investigation, demonstrating that although active tuberculosis (TB) cases were diagnosed through 2013, no transmission events took place beyond mid-2012. Subsequent cases were the result of progression from latent TB infection to active disease, and not recent transmission. This evolutionary genomic approach was used to declare the outbreak over in January 2015.

Keywords: Tuberculosis; genomic epidemiology; phylogenetics; transmission.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Disease Outbreaks*
  • Genomics*
  • Humans
  • Infection Control
  • Molecular Epidemiology / methods*
  • Mycobacterium tuberculosis / genetics*
  • Tuberculosis / epidemiology*
  • Tuberculosis / prevention & control
  • Tuberculosis / transmission

Associated data

  • figshare/10.6084/m9.figshare.3153280