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25 December 2020 Distribution and Density of Haemaphysalis longicornis (Acari: Ixodidae) on Public Lands in Pennsylvania, United States
Keith J. Price, Bryn J. Witmier, Rebecca A. Eckert, Christian N. Boyer, Matt W. Helwig, Andrew D. Kyle
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Abstract

Since the recent introduction of the Asian longhorned tick (Haemaphysalis longicornis Neumann) in the United States, quantitative surveillance information remains lacking, which hinders accurate estimates of population structure and entomological risk. We conducted statewide, active tick surveillance from May to August 2019 and report data on H. longicornis geographical distribution and population density in Pennsylvania. In total, 615 H. longicornis were collected from four counties. Across samples recovering H. longicornis, mean density of H. longicornis was 9.2/100 m2, comparably greater than Ixodes scapularis Say (8.5/100 m2). Density of H. longicornis was also significantly greater in August, largely driven by larvae, and greater in recreational habitat types (12.6/100 m2) and in Bucks County (11.7/100 m2), situated adjacent to the location of the first U.S. discovery of intense infestations. These data are among the first to document H. longicornis from statewide tick surveillance and provide initial measures of population density enabling more quantitative characterizations of distributional patterns.

© The Author(s) 2020. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.
Keith J. Price, Bryn J. Witmier, Rebecca A. Eckert, Christian N. Boyer, Matt W. Helwig, and Andrew D. Kyle "Distribution and Density of Haemaphysalis longicornis (Acari: Ixodidae) on Public Lands in Pennsylvania, United States," Journal of Medical Entomology 58(3), 1433-1438, (25 December 2020). https://doi.org/10.1093/jme/tjaa274
Received: 20 August 2020; Accepted: 11 November 2020; Published: 25 December 2020
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KEYWORDS
Asian longhorned tick
density
Pennsylvania
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