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Volume 32, Number 6—June 2026

Dispatch

Concurrent Detection of Swine-Origin Influenza A(H1N1) Virus in Pigs and Farmer, Switzerland

Jonas Steiner1, Mike Mwanga1, Larise Oberholster, Matthias Licheri, Manon F. Licheri, Heiko Nathues2, Ronald Dijkman2, and Jenna N. Kelly2Comments to Author 
Author affiliation: University of Bern Multidisciplinary Center for Infectious Diseases, Bern, Switzerland (J. Steiner, M. Mwanga, L. Oberholster, M. Licheri, M.F. Licheri, H. Nathues, R. Dijkman, J.N. Kelly); University of Bern Vetsuisse Faculty, Bern (J. Steiner, M. Mwanga, H. Nathues, J.N. Kelly); University of Bern Faculty of Medicine, Bern (M. Mwanga, L. Oberholster, M. Licheri, M.F. Licheri, R. Dijkman); Institute of Virology and Immunology, Bern and Mittelhäusern, Switzerland (M. Mwanga, J.N. Kelly)

Main Article

Figure 1

Timeline of events from study of swine-origin influenza A(H1N1) virus in pigs and farmer, Switzerland, November 2023. Image depicts the chronology of symptoms in pigs and humans, sampling dates, and household investigations, along with corresponding qRT-PCR results. Figure created in BioRender (Mwanga M, 2025, https://BioRender.com/te6k5rt). IAV, influenza A virus; ILI, influenza-like illness; NRCI, National Reference Centre for Influenza, Switzerland; M, matrix; qRT-PCR, quantitative reverse transcription PCR; ZIV, Institute of Virology, Vetsuisse Faculty, University of Zurich; –, negative; +, positive.

Figure 1. Timeline of events from study of swine-origin influenza A(H1N1) virus in pigs and farmer, Switzerland, November 2023. Image depicts the chronology of symptoms in pigs and humans, sampling dates, and household investigations, along with corresponding qRT-PCR results. Figure created in BioRender (Mwanga M, 2025, https://BioRender.com/te6k5rt). IAV, influenza A virus; ILI, influenza-like illness; NRCI, National Reference Centre for Influenza, Switzerland; M, matrix; qRT-PCR, quantitative reverse transcription PCR; ZIV, Institute of Virology, Vetsuisse Faculty, University of Zurich; –, negative; +, positive.

Main Article

1These first authors contributed equally to this article.

2These senior authors contributed equally to this article.

Page created: April 27, 2026
Page updated: June 01, 2026
Page reviewed: June 01, 2026
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