posted on 2025-12-24, 00:10authored byRachael Giglio, Aaron Westmoreland, Mark Wilber, Grete Wilson-Henjum, Aung Chan, Billy Gardner, Wantida Horpiencharoen, Roderick Gagne, Avery Corondi, Alec Baker, Matthew Combs, Jeffrey Chandler, Kezia Manlove, Kim Pepin
<p>In this study, we used a multi-faceted approach to understand patterns of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission and persistence in a wild white-tailed deer population. Serology data indicated transmission of SARS-CoV-2 and persistence during the seven-month sampling period. Traditional disease modeling based on deer-to-deer transmission indicated relatively low prevalence with an R 0 of 1.2 and recovery period of 5 days; however, individual-based modeling informed by GPS tracked-movement data captured a potential transmission event. Phylogenetic analyses revealed a recurring pattern of divergent groups of deer-derived sequences with human-derived sequences falling close to each deer-derived cluster.Further, human-derived sequences were frequently sampled months prior to the deer-derived sequences, indicating repeated human to deer spillover. Using multiple types of data as well as both fine and broad scale analyses, we have characterized a pattern of localized outbreaks of SARS-CoV-2 within white-tailed deer populations that are likely recurring due to frequent spillover events. Our results suggest that while deer-to-deer transmission occurs over small spatiotemporal scales, SARS-CoV-2 persistence over longer periods and across larger regions is likely driven by repeated spillover from human populations.</p>