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. 2020 Dec;103(6):2438-2441.
doi: 10.4269/ajtmh.19-0874. Epub 2020 Oct 29.

Eastern Equine Encephalitis Virus Seroprevalence in Maine Cervids, 2012-2017

Joan L Kenney  1 , Elizabeth Henderson  2 , John-Paul Mutebi  1 , Kali Saxton-Shaw  1 , Angela Bosco-Lauth  1 , Susan P Elias  2 , Sara Robinson  3 , Robert P Smith  2 , Charles Lubelczyk  2
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Eastern Equine Encephalitis Virus Seroprevalence in Maine Cervids, 2012-2017

Joan L Kenney et al. Am J Trop Med Hyg. 2020 Dec.

Abstract

Eastern equine encephalitis virus (EEEV) first emerged in Maine in the early 2000s and resulted in an epizootic outbreak in 2009. Since 2009, serum samples from cervids throughout Maine have been collected and assessed for the presence of neutralizing antibodies to EEEV to assess EEEV activity throughout the state. We tested 1,119 Odocoileus virginianus (white-tailed deer) and 982 Alces americanus (moose) serum samples collected at tagging stations during the hunting seasons from 2012 to 2017 throughout the state of Maine. Odocoileus virginianus from all 16 counties were EEEV seropositive, whereas A. americanus were seropositive in the northwestern counties of Aroostook, Somerset, Piscataquis, and Franklin counties. Seroprevalence in O. virginianus ranged from 6.6% to 21.2% and in A. americanus from 6.6% to 10.1%. Data from this report in conjunction with findings previously reported from 2009 to 2011 indicate that EEEV is endemic throughout Maine.

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Conflict of interest statement

Disclaimer: The findings and conclusions in this report are those of the authors and do not necessarily represent the official position of the Centers for Disease Control.

Figures

Figure 1.
Figure 1.
Map of Maine illustrating collection origin of cervid serum and seropositivity status of samples collected from 2012 to 2017.
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