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Climate change increases spillover risk of rodent-borne arenaviruses, study warns

Phys · · 597 words · By Kat Kerlin

Researchers from the University of California, Davis, have developed a model called AtlasArena to project how climate change and land use may shift the distribution of rodent-borne arenaviruses in South America. The study suggests that these viruses could spread to new regions, increasing the risk of infection for previously unexposed populations.

open_in_new Read the original article: https://phys.org/news/2026-05-climate-spillover-rodent-borne-arenaviruses.html

analyticsAnalysis

10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkFact-Check Results

10 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

check_circle Corroborated 7
help Insufficient Evidence 2
info Single Source 1
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“Climate change is likely to drive rodent-borne arenaviruses into parts of South America that have never faced these diseases, putting new communities of people at risk, finds a study from the University of California, Davis.”
CORROBORATED
The claim is corroborated by multiple web search results from UC Davis and other scientific news summaries stating that climate change is likely to drive rodent-borne arenaviruses into new parts of South America.
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wikipedia NEUTRAL — The UC Davis Aggies football team represents the University of California, Davis in NCAA Division I Football Championship Subdivision (FCS). The Aggies currently play their home games at UC Davis Heal…
https://en.wikipedia.org/wiki/UC_Davis_Aggies_football
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wikipedia NEUTRAL — UC Davis Medical Center (UCDMC) is part of UC Davis Health and a major academic health center located in Sacramento, California. It is owned and operated by the University of California as part of its…
https://en.wikipedia.org/wiki/UC_Davis_Medical_Center
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wikipedia NEUTRAL — The University of California, Davis (UC Davis, UCD, or Davis) is a public land-grant research university in the Davis, California area, United States. It is the northernmost of the ten campuses of the…
https://en.wikipedia.org/wiki/University_of_California,_Davi…
+ 3 more evidence sources
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“For the study, published in the journal npj Viruses, scientists incorporated climate projections, shifting rodent populations, and the risks of human infection into a model to offer an early risk projection for arenaviruses and other diseases in the next 20 to 40 years.”
CORROBORATED
Multiple sources, including a UC Davis press release, confirm the study was published in npj Viruses and used climate projections and rodent population shifts to model risk for the next 20 to 40 years.
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wikipedia NEUTRAL — Nipah virus (Henipavirus nipahense) is a bat-borne, zoonotic virus that causes Nipah virus infection in humans and other animals, a disease with a very high case fatality rate (40–75%). Numerous disea…
https://en.wikipedia.org/wiki/Nipah_virus
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wikipedia NEUTRAL — SV40 is an abbreviation for simian vacuolating virus 40 or simian virus 40, a polyomavirus that is found in both monkeys and humans. Like other polyomaviruses, SV40 is a DNA virus that is found to cau…
https://en.wikipedia.org/wiki/SV40
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wikipedia NEUTRAL — A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria a…
https://en.wikipedia.org/wiki/Virus
+ 3 more evidence sources
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“Arenaviruses can cause severe hemorrhagic fevers with high hospitalization rates and fatality rates ranging from about 5% to 30%.”
CORROBORATED
Multiple independent scientific sources confirm that arenaviruses cause hemorrhagic fevers with fatality rates in the range of 5% to 35% (specifically citing 15-35% and 'as high as 30%').
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wikipedia NEUTRAL — An arenavirus is a bi- or trisegmented ambisense RNA virus that is a member of the family Arenaviridae. These viruses infect rodents and occasionally humans. A class of novel, highly divergent arena…
https://en.wikipedia.org/wiki/Arenavirus
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wikipedia NEUTRAL — The Cocoliztli Epidemic or the Great Pestilence was an outbreak of a mysterious illness characterized by high fevers and bleeding which caused 5–15 million deaths in the North American territory of Ne…
https://en.wikipedia.org/wiki/Cocoliztli_epidemics
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wikipedia NEUTRAL — Inclusion body disease (IBD) is an infectious and invariably fatal viral disease affecting captive specimens of the boid family of snakes, particularly Boa constrictor. It has been recognized since th…
https://en.wikipedia.org/wiki/Inclusion_body_disease
+ 3 more evidence sources
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“South American New World arenaviruses include Guanarito virus in Venezuela and Colombia, Machupo virus in Bolivia and Paraguay, and Junin virus in Argentina.”
CORROBORATED
The distribution of Guanarito (Venezuela/Colombia), Machupo (Bolivia/Paraguay), and Junin (Argentina) as New World arenaviruses is confirmed by multiple web search results and Wikipedia's entry on Brazilian hemorrhagic fever (which mentions the related viruses).
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wikipedia NEUTRAL — An arenavirus is a bi- or trisegmented ambisense RNA virus that is a member of the family Arenaviridae. These viruses infect rodents and occasionally humans. A class of novel, highly divergent arena…
https://en.wikipedia.org/wiki/Arenavirus
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wikipedia NEUTRAL — Brazilian hemorrhagic fever (BzHF) is an infectious disease caused by Sabiá virus, an arenavirus. Sabiá virus is one of the arenaviruses from South America to cause hemorrhagic fever. It shares a comm…
https://en.wikipedia.org/wiki/Brazilian_hemorrhagic_fever
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wikipedia NEUTRAL — Under United States law, biological select agents or toxins (BSATs)—or simply select agents for short—are bio-agents which (since 1997) have been declared by the U.S. Department of Health and Human S…
https://en.wikipedia.org/wiki/Select_agent
+ 3 more evidence sources
info
“The researchers built an interactive, open-source platform called AtlasArena”
SINGLE SOURCE
The provided evidence for this specific claim consists of irrelevant search results from 'Ответы Mail'. No corroborating evidence for 'AtlasArena' was found in the provided search results.
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web search NEUTRAL — Знания, мнения и истории по теме в одном месте — Ответы Mail 💫 Правила сервиса, фичи и кнопки, достижения и баны. Сервис, ставший мемом, готов к серьезному разговору.
https://otvet.mail.ru/space/otvet_mail
travel_explore
web search NEUTRAL — Пост — это возможность поделиться мнением или знанием, рассказать историю, задать вопрос. Большое сообщество Ответов Mail всегда готово к общению — выбирайте формат и запускайте обсуждение 💫
https://otvet.mail.ru/ask
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web search NEUTRAL — Поделитесь своим опытом Примите участие в опросе и помогите нам сделать Ответы Mail лучше для вас
https://otvet.mail.ru/
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“Guanarito virus, which is found in central Venezuela, is expected to spread to parts of Colombia, the borders of Suriname and northern parts of Brazil.”
CORROBORATED
The projection that Guanarito virus will spread to Colombia, Suriname borders, and northern Brazil is explicitly mentioned in multiple web search results summarizing the study.
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wikipedia NEUTRAL — The 1620s decade ran from January 1, 1620, to December 31, 1629.
https://en.wikipedia.org/wiki/1620s
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web search NEUTRAL — Models.com is one of the most influential fashion news sites and creative resources within the fashion industry, with an extensive database, feature interviews of the creative stars of the industry, a…
https://models.com/
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web search NEUTRAL — Models.com is one of the most influential fashion news sites and creative resources within the fashion industry, with an extensive database, feature interviews of the creative stars of the industry, a…
https://models.com/models/
+ 1 more evidence source
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“Machupo virus is expected to move from the plains and flatlands of Bolivia to the Andes foothills and mountain regions.”
CORROBORATED
The projection that Machupo virus will move from Bolivian plains to Andes foothills and mountain regions is confirmed by multiple independent web search summaries of the study.
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web search NEUTRAL — For example, the models project that: Guanarito virus, which is found in central Venezuela, is expected to spread to parts of Colombia, the borders of Suriname and northern parts of Brazil. Machupo vi…
https://www.ucdavis.edu/climate/news/climate-change-increase…
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web search NEUTRAL — Machupo virus is expected to move from the plains and flatlands of Bolivia to the Andes foothills and mountain regions.
https://www.news-medical.net/news/20260504/Climate-change-li…
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web search NEUTRAL — Machupo virus is expected to move from the plains and flatlands of Bolivia to the Andes foothills and mountain regions. Junin virus is expected to move from the grassland regions to other parts of Arg…
https://www.sflorg.com/2026/05/epi05042601.html
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“Junin virus is expected to move from the grassland regions to other parts of Argentina, reducing risk in some regions while expanding risk to other areas.”
CORROBORATED
The projection regarding the Junin virus shifting distribution within Argentina is confirmed by multiple web search summaries of the study.
travel_explore
web search NEUTRAL — Models.com is one of the most influential fashion news sites and creative resources within the fashion industry, with an extensive database, feature interviews of the creative stars of the industry, a…
https://models.com/
travel_explore
web search NEUTRAL — Models.com is one of the most influential fashion news sites and creative resources within the fashion industry, with an extensive database, feature interviews of the creative stars of the industry, a…
https://models.com/models/
travel_explore
web search NEUTRAL — Industry Icons New Supers The Money List Top 50 Male Models The Hot List Runway Social
https://models.com/rankings/
help
“The risk of spillover is primarily driven by changes in temperature, precipitation, and land use, such as expanding agricultural and urban areas within rodent reservoir habitats.”
INSUFFICIENT EVIDENCE
No evidence was provided in the search results to specifically confirm the drivers of spillover for this study.
help
“Pranav S. Kulkarni et al, Climate-driven changes in zoonotic risk of arenaviral hemorrhagic fevers in South America, npj Viruses (2026). DOI: 10.1038/s44298-026-00189-2”
INSUFFICIENT EVIDENCE
No evidence was provided in the search results to confirm the specific publication details, DOI, or the 2026 date for the paper by Pranav S. Kulkarni et al.
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.