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Volume 26, Number 7—July 2020

Heartland Virus in Humans and Ticks, Illinois, USA, 2018–2019

Holly C. Tuten1Comments to Author , Kristen L. Burkhalter1, Kylee R. Noel, Erica J. Hernandez, Seth Yates, Keith Wojnowski, John Hartleb, Samantha Debosik, April Holmes, and Christopher M. Stone
Author affiliations: University of Illinois at Urbana-Champaign, Champaign, Illinois, USA (H.C. Tuten, K.R. Noel, E.J. Hernandez, S. Yates, C.M. Stone); Centers for Disease Control and Prevention, Fort Collins, Colorado, USA (K.L. Burkhalter); Kankakee County Health Department, Kankakee, Illinois, USA (K. Wojnowski); US Fish & Wildlife Service, Marion, Illinois, USA (J. Hartleb); Illinois Department of Public Health, Springfield, Illinois, USA (S. Debosik, A. Holmes)

Main Article

Table 2

Prevalence of Heartland virus in ticks, by location, species, and sex in 2 counties in Illinois, USA, 2019*

Species Stage Sex County No. ticks collected No. pools No. positive pools Infection rate/1,00 ticks, MLE (95% CI)
Amblyomma americanum Adult M Kankakee 107 16 1 9.46 (0.55–46.1)
A. americanum Adult F Kankakee 111 12 0 0 (0–29.5)
A. americanum Nymph NA Kankakee 413 15 0 0 (0–8.2)
A. americanum Adult M Williamson 132 15 1 7.6 (0.44–36.9)
A. americanum Adult F Williamson 154 17 0 0 (0–22.16)
A. americanum Nymph NA Williamson 211 8 0 0 (0–14.5)
Dermacentor variabilis Adult Both Kankakee 27 (16 F, 11 M) 4 0 0 (0–92.8)
D. variabilis Adult Both Williamson 10 (5 F, 5 M) 6 0 0 (0–248.8)

*MLE, maximum-likelihood estimation; NA, not applicable.

Main Article

1These authors contributed equally to this article.

Page created: May 01, 2020
Page updated: June 18, 2020
Page reviewed: June 18, 2020
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