Evidence map›Paper›PMID 35725735›Full record

ArticleNature communications2022

SARS-CoV-2 Omicron variant causes mild pathology in the upper and lower respiratory tract of hamsters.

Federico Armando, Georg Beythien, Franziska K Kaiser, Lisa Allnoch, Laura Heydemann, Malgorzata Rosiak, Svenja Becker, Mariana Gonzalez-Hernandez, Mart M Lamers, Bart L Haagmans and 5 more

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 77 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
77citing papers in PubMed, 1 pooled it
12.3field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

77 citing papers in PubMed, 1 synthesis or guideline pooled it, 127 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Rehabilitation needs of long COVID patients in British Columbia.PM & R : the journal of injury, function, and rehabilitation · 2026
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  11. SARS-CoV-2-derived RNA replicons as safe and effective vaccines.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  12. Article
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  14. In-hospital mortality among children and adults hospitalized with COVID-19 in Africa across pre-delta, delta, and omicron SARS-CoV-2 waves.International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases · 2025
    Article
  15. Omicron Impacts Olfaction in Hamsters.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2025
    Article
  16. Viruses · 2025
    Article
  17. Article
  18. Review
  19. Article
  20. Article

17 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

15 authors at 3 institutions in 2 countries.

Federico Armando *Department of Pathology, University of Veterinary Medicine, Foundation, Hanover, Germany.ORCID 0000-0002-2578-4409
Georg Beythien *Department of Pathology, University of Veterinary Medicine, Foundation, Hanover, Germany.ORCID 0000-0002-2192-2413
Franziska K Kaiser *Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine, Foundation, Hanover, Germany.
Lisa AllnochDepartment of Pathology, University of Veterinary Medicine, Foundation, Hanover, Germany.ORCID 0000-0002-8822-4409
Laura HeydemannDepartment of Pathology, University of Veterinary Medicine, Foundation, Hanover, Germany.ORCID 0000-0002-9958-4872
Malgorzata RosiakDepartment of Pathology, University of Veterinary Medicine, Foundation, Hanover, Germany.ORCID 0000-0001-5117-3989
Svenja BeckerDepartment of Pathology, University of Veterinary Medicine, Foundation, Hanover, Germany.
Mariana Gonzalez-HernandezResearch Center for Emerging Infections and Zoonoses, University of Veterinary Medicine, Foundation, Hanover, Germany.ORCID 0000-0001-7019-2165
Mart M LamersDepartment of Viroscience, Erasmus MC, Rotterdam, Netherlands.ORCID 0000-0002-1431-4022
Bart L HaagmansDepartment of Viroscience, Erasmus MC, Rotterdam, Netherlands.ORCID 0000-0001-6221-2015
Kate GuilfoyleViroclinics Xplore, Schaijk, Netherlands.
Geert van AmerongenViroclinics Xplore, Schaijk, Netherlands.
Malgorzata Ciurkiewicz *Department of Pathology, University of Veterinary Medicine, Foundation, Hanover, Germany.ORCID 0000-0001-6277-7366
Albert D M E Osterhaus *Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine, Foundation, Hanover, Germany.
Wolfgang Baumgärtner *Department of Pathology, University of Veterinary Medicine, Foundation, Hanover, Germany. Wolfgang.Baumgaertner@tiho-hannover.de.ORCID 0000-0001-8151-5644
University of Veterinary Medicine Hannover, Foundation · DEErasmus MC · NLViroclinics Biosciences (Netherlands) · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Since its discovery in 2019, multiple variants of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) have been identified. This study investigates virus spread and associated pathology in the upper and lower respiratory tracts of Syrian golden hamsters at 4 days post intranasal SARS-CoV-2 Omicron infection, in comparison to infection with variants of concern (VOCs) Gamma and Delta as well as ancestral strain 614 G. Pathological changes in the upper and lower respiratory tract of VOC Omicron infected hamsters are milder than those caused by other investigated strains. VOC Omicron infection causes a mild rhinitis with little involvement of the olfactory epithelium and minimal lesions in the lung, with frequent sparing of the alveolar compartment. Similarly, viral antigen, RNA and infectious virus titers are lower in respiratory tissues of VOC Omicron infected hamsters. These findings demonstrate that the variant has a decreased pathogenicity for the upper and lower respiratory tract of hamsters.

Indexed as

COVID-19SARS-CoV-2AnimalsCricetinaeLungMesocricetus

Identifiers

PMID35725735
PMCPMC9207884
OpenAlexW4283164367

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.