Comparing Francisella tularensis Genomes to Understand Pathogenicity
Author Information
Author(s): Rohmer Laurence, Fong Christine, Abmayr Simone, Wasnick Michael, Larson Freeman Theodore J, Radey Matthew, Guina Tina, Svensson Kerstin, Hayden Hillary S, Jacobs Michael, Gallagher Larry A, Manoil Colin, Ernst Robert K, Drees Becky, Buckley Danielle, Haugen Eric, Bovee Donald, Zhou Yang, Chang Jean, Levy Ruth, Lim Regina, Gillett Will, Guenthener Don, Kang Allison, Shaffer Scott A, Taylor Greg, Chen Jinzhi, Gallis Byron, D'Argenio David A, Forsman Mats, Olson Maynard V, Goodlett David R, Kaul Rajinder, Miller Samuel I, Brittnacher Mitchell J
Primary Institution: University of Washington
Hypothesis
What genetic factors allow some subspecies of Francisella tularensis to be pathogenic to humans while others are not?
Conclusion
The study reveals that genetic drift and specific mutations play significant roles in the evolution of pathogenic strains of Francisella tularensis.
Supporting Evidence
- The genomes of pathogenic strains show a higher number of pseudogenes compared to non-pathogenic strains.
- Genomic rearrangements were identified that are specific to human pathogenic strains.
- The study provides a coarse chronology of evolutionary events leading to pathogenicity.
- Specific genes associated with virulence were found to be absent in the non-pathogenic strain.
Takeaway
Some types of bacteria can make people sick, and this study looks at how their genes change over time to help them do that.
Methodology
The genomes of pathogenic and non-pathogenic strains of Francisella tularensis were sequenced and compared to identify genetic differences.
Limitations
The study primarily focuses on genomic comparisons and may not account for all environmental factors influencing pathogenicity.
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website