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New tool advances investigations of disease outbreaks

Date:
April 15, 2014
Source:
Molecular Biology and Evolution (Oxford University Press)
Summary:
A new field called genomic epidemiology is taking advantage of the rapidly reduced costs of next-generation DNA sequencing to better inform public health officials faced with ongoing outbreaks. While the authors caution that genomics alone cannot truly replace traditional epidemiology, they show the value and potential of using their sequence data analysis tool as a companion method for public health officials to shed light on outbreaks.

To combat disease outbreaks, public health officials often use painstaking fieldwork to try to stay one step ahead of the infectious bugs, linking patients' symptoms to a source of infection to quickly identify the common culprit in related cases.

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Now, a new field called genomic epidemiology is taking advantage of the rapidly reduced costs of next-generation DNA sequencing to better inform public health officials faced with ongoing outbreaks. In the advanced online edition of Molecular Biology and Evolution, authors Didelot et al. developed a versatile computational tool that can rely on genomic data alone or be customized to add weighted information from field epidemiology (such as timing of infectivity, level of infectivity, geographic location, etc.). The research group tested the new tool's reliability against a real-world dataset to reconstruct the transmission of an outbreak of M. tuberculosis.

"We're on the edge of an exciting new era in public health epidemiology, as genomics gives us the ability to reconstruct outbreaks in far more detail and with much greater accuracy than ever before. This paper addresses an important question -- just how much information about an outbreak can we reliably derive from genomic data alone -- and gives public health officials a new tool for their detective kits," according to authors Jennifer Gardy, Caroline Colijn, and Xavier Didelot.

With their tool, they found that they were able to capture several aspects of known epidemiology. For example, their method correctly inferred the most likely source case and several key transmission clusters.

While the authors caution that genomics alone cannot truly replace traditional epidemiology, they show the value and potential of using their sequence data analysis tool as a companion method for public health officials to shed light on outbreaks.


Story Source:

The above story is based on materials provided by Molecular Biology and Evolution (Oxford University Press). Note: Materials may be edited for content and length.


Journal Reference:

  1. X. Didelot, J. Gardy, C. Colijn. Bayesian inference of infectious disease transmission from whole genome sequence data. Molecular Biology and Evolution, 2014; DOI: 10.1093/molbev/msu121

Cite This Page:

Molecular Biology and Evolution (Oxford University Press). "New tool advances investigations of disease outbreaks." ScienceDaily. ScienceDaily, 15 April 2014. <www.sciencedaily.com/releases/2014/04/140415181332.htm>.
Molecular Biology and Evolution (Oxford University Press). (2014, April 15). New tool advances investigations of disease outbreaks. ScienceDaily. Retrieved November 24, 2014 from www.sciencedaily.com/releases/2014/04/140415181332.htm
Molecular Biology and Evolution (Oxford University Press). "New tool advances investigations of disease outbreaks." ScienceDaily. www.sciencedaily.com/releases/2014/04/140415181332.htm (accessed November 24, 2014).

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