Abstract
Whole-genome sequencing has provided fundamental insights into infectious disease epidemiology, but has rarely been used for examining transmission dynamics of a bacterial pathogen in wildlife. In the Greater Yellowstone Ecosystem (GYE), outbreaks of brucellosis have increased in cattle along with rising seroprevalence in elk. Here we use a genomic approach to examine Brucella abortus evolution, cross-species transmission and spatial spread in the GYE. We find that brucellosis was introduced into wildlife in this region at least five times. The diffusion rate varies among Brucella lineages (∼3 to 8 km per year) and over time. We also estimate 12 host transitions from bison to elk, and 5 from elk to bison. Our results support the notion that free-ranging elk are currently a self-sustaining brucellosis reservoir and the source of livestock infections, and that control measures in bison are unlikely to affect the dynamics of unrelated strains circulating in nearby elk populations.
| Original language | English |
|---|---|
| Article number | 11448 |
| Journal | Nature Communications |
| Volume | 7 |
| DOIs | |
| State | Published - May 11 2016 |
Funding
Funding was provided by the U.S. Geological Survey, U.S. Department of Agriculture and National Science Foundation-Ecology and Evolution of Infectious Diseases (DEB-1067129). Partial funding was provided by the New Hampshire Agricultural Experiment Station (Scientific Contribution Number 2664). This work was supported by the USDA National Institute of Food and Agriculture Hatch Project (1007917).
| Funder number |
|---|
| DEB-1067129 |
| 2664 |
| 1007917 |
| 1067129 |