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Spatial, Temporal, and Genetic Invasion Dynamics of Aedes albopictus (Diptera: Culicidae) in Illinois.

  • Stone, Chris M1
  • Zuo, Zhen2
  • Li, Bo2
  • Ruiz, Marilyn3
  • Swanson, Jack4
  • Hunt, Jason5
  • Kim, Chang-Hyun1
  • Smith, Rebecca L3
  • 1 Illinois Natural History Survey, University of Illinois at Urbana-Champaign, 1816 South Oak Street, Champaign, IL.
  • 2 Department of Statistics, University of Illinois at Urbana-Champaign, 725 South Wright Street, Champaign, IL.
  • 3 Department of Pathobiology, University of Illinois at Urbana-Champaign, 2001 South Lincoln Avenue, Urbana, IL.
  • 4 Division of Environmental Health, Illinois Department of Public Health, 525-535 West Jefferson Street Springfield, IL.
  • 5 Department of Biological Sciences, Western Illinois University, Macomb, IL.
Published Article
Journal of Medical Entomology
Oxford University Press
Publication Date
Sep 07, 2020
DOI: 10.1093/jme/tjaa047
PMID: 32195543


The spread of the Asian tiger mosquito, Aedes albopictus Skuse, throughout the United States has implications for the transmission potential of vector-borne diseases. We used a 30-yr data set of occurrence records in Illinois and developed a hierarchical Bayesian model to shed light on the patterns and processes involved in the introduction and expansion along the northern edge of the geographic range of this species. We also collected specimens from 10 locations and sequenced a segment of their mitochondrial COI genes to assess possible introduction sources and geographic patterns in genetic variation present within contemporary populations. We documented an increase in the number of observations throughout the southern and central parts of Illinois over the study period. The process through which this spread occurred is likely only partially due to local dispersal. The probability of successfully overwintering was likewise low, but both these parameters increased over the study period. This suggests that the presence of Ae. albopictus has been largely due to repeated introductions, but that in recent years populations may have become established and are leading to an increase in locally driven dispersal. There was considerable genetic diversity among populations in Illinois, with 13 distinct haplotypes present in 10 sampling locations, several of which matched haplotypes previously found to be present in locations such as Texas or Japan. Further research is needed to understand how the combination of continued propagule pressure and establishment of populations are driving the increase and expansion of this invasive mosquito along its northern distribution limit. © The Author(s) 2020. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: [email protected]

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