Anthropozoonotic spillovers reveal sustained long-term cryptic circulation of SARS-CoV-2 within and between Lithuanian mink farms

Abstract Several studies have documented reverse zoonotic transmission of SARS-CoV-2, including in farmed mink which are susceptible to human respiratory viruses and are known for serving as a reservoir capable of generating new virus variants in densely populated farms. Here, we present the genomic investigation launched in response to detection of human infections with mink-origin SARS-CoV-2 lineages, and show evidence of at least 14 high-confidence introductions of SARS-CoV-2 from humans into farmed mink in Lithuania where sustained transmission in farmed mink lasted up to a year. We estimated the most likely timeframes for these introductions encompassing at least six SARS-CoV-2 lineages, some of which were already extinct in humans, with Bayesian phylogenetic and molecular clock analyses. This study highlights the public health risks posed by fur farms and underscores that passive genomic surveillance systems are ineffective without the active involvement and expertise of responsible institutions.

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Publication Details

Journal
Virus Evolution
Published
2026-03-12
DOI
https://doi.org/10.1093/ve/veag014
Primary Topic
Zoonotic diseases and public health
Type
article
Field-Weighted Citation Impact
0.00

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article

Anthropozoonotic spillovers reveal sustained long-term cryptic circulation of SARS-CoV-2 within and between Lithuanian mink farms

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Virus Evolution
Zoonotic diseases and public health
article

Anthropozoonotic spillovers reveal sustained long-term cryptic circulation of SARS-CoV-2 within and between Lithuanian mink farms

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article en

Abstract

Abstract Several studies have documented reverse zoonotic transmission of SARS-CoV-2, including in farmed mink which are susceptible to human respiratory viruses and are known for serving as a reservoir capable of generating new virus variants in densely populated farms. Here, we present the genomic investigation launched in response to detection of human infections with mink-origin SARS-CoV-2 lineages, and show evidence of at least 14 high-confidence introductions of SARS-CoV-2 from humans into farmed mink in Lithuania where sustained transmission in farmed mink lasted up to a year. We estimated the most likely timeframes for these introductions encompassing at least six SARS-CoV-2 lineages, some of which were already extinct in humans, with Bayesian phylogenetic and molecular clock analyses. This study highlights the public health risks posed by fur farms and underscores that passive genomic surveillance systems are ineffective without the active involvement and expertise of responsible institutions.

Virus Evolution
Lithuanian University of Health Sciences (LT), Vilnius University (LT), Government of the United States of America (US), Erasmus MC (NL), Hospital of Lithuanian University of Health Sciences Kaunas Clinics (LT), Rigshospitalet (DK), Food Research Institute (SK), Agency for Science, Innovation and Technology (LT), State Research Institute Centre for Innovative Medicine (LT), Valstybinių Miškų Urėdija (LT), Addenbrooke's Hospital (GB), Vilnius University Hospital Santariskiu Klinikos (LT)
Lietuvos Mokslo Taryba
Good health and well-being
Openalex Percentile: Top 27%
Zoonotic diseases and public health
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