Spatial and Temporal Emergence Pattern of Lyme Disease in Virginia

Jie Li Department of Statistics, Virginia Tech, Blacksburg, Virginia; Department of Geography, Virginia Tech, Blacksburg, Virginia; Department of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, Virginia; Office of Epidemiology, Virginia Department of Health, Richmond, Virginia

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Korine N. Kolivras Department of Statistics, Virginia Tech, Blacksburg, Virginia; Department of Geography, Virginia Tech, Blacksburg, Virginia; Department of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, Virginia; Office of Epidemiology, Virginia Department of Health, Richmond, Virginia

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Yili Hong Department of Statistics, Virginia Tech, Blacksburg, Virginia; Department of Geography, Virginia Tech, Blacksburg, Virginia; Department of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, Virginia; Office of Epidemiology, Virginia Department of Health, Richmond, Virginia

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Yuanyuan Duan Department of Statistics, Virginia Tech, Blacksburg, Virginia; Department of Geography, Virginia Tech, Blacksburg, Virginia; Department of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, Virginia; Office of Epidemiology, Virginia Department of Health, Richmond, Virginia

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Sara E. Seukep Department of Statistics, Virginia Tech, Blacksburg, Virginia; Department of Geography, Virginia Tech, Blacksburg, Virginia; Department of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, Virginia; Office of Epidemiology, Virginia Department of Health, Richmond, Virginia

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Stephen P. Prisley Department of Statistics, Virginia Tech, Blacksburg, Virginia; Department of Geography, Virginia Tech, Blacksburg, Virginia; Department of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, Virginia; Office of Epidemiology, Virginia Department of Health, Richmond, Virginia

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James B. Campbell Department of Statistics, Virginia Tech, Blacksburg, Virginia; Department of Geography, Virginia Tech, Blacksburg, Virginia; Department of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, Virginia; Office of Epidemiology, Virginia Department of Health, Richmond, Virginia

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David N. Gaines Department of Statistics, Virginia Tech, Blacksburg, Virginia; Department of Geography, Virginia Tech, Blacksburg, Virginia; Department of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, Virginia; Office of Epidemiology, Virginia Department of Health, Richmond, Virginia

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The emergence of infectious diseases over the past several decades has highlighted the need to better understand epidemics and prepare for the spread of diseases into new areas. As these diseases expand their geographic range, cases are recorded at different geographic locations over time, making the analysis and prediction of this expansion complicated. In this study, we analyze spatial patterns of the disease using a statistical smoothing analysis based on areal (census tract level) count data of Lyme disease cases in Virginia from 1998 to 2011. We also use space and space–time scan statistics to reveal the presence of clusters in the spatial and spatiotemporal distribution of Lyme disease. Our results confirm and quantify the continued emergence of Lyme disease to the south and west in states along the eastern coast of the United States. The results also highlight areas where education and surveillance needs are highest.

Author Notes

* Address correspondence to Jie Li, Department of Statistics, Virginia Tech, 413B Hutcheson Hall, Blacksburg, VA 24061. E-mail: jieli@vt.edu

Financial support: This research was supported by National Science Foundation Grant BCS-1122876 to Virginia Tech.

Authors' addresses: Jie Li, Yili Hong, and Yuanyuan Duan, Department of Statistics, Virginia Tech, Blacksburg, VA, E-mails: jieli@vt.edu, yilihong@vt.edu, and yyduan@vt.edu. Korine N. Kolivras, Sara E. Seukep, and James B. Campbell, Department of Geography, Virginia Tech, Blacksburg, VA, E-mails: korine@vt.edu, sdymond@vt.edu, and jayhawk@vt.edu. Stephen P. Prisley, Department of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, VA, E-mail: prisley@vt.edu. David N. Gaines, Office of Epidemiology, Virginia Department of Health, Richmond, VA, E-mail: David.Gaines@vdh.virginia.gov.

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