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Broberg EK, Svartström O, Riess M, Kraus A, Vukovikj M, Melidou A. Co-circulation of seasonal influenza A(H1N1)pdm09, A(H3N2) and B/Victoria lineage viruses with further genetic diversification, EU/EEA, 2022/23 influenza season. Euro Surveill 2024; 29. [PMID: 39328158 DOI: 10.2807/1560-7917.es.2024.29.39.2400020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2024] Open
Abstract
BackgroundInfluenza viruses can cause large seasonal epidemics with high healthcare impact and severity as they continually change their virological properties such as genetic makeup over time.AimWe aimed to monitor the characteristics of circulating influenza viruses over the 2022/23 influenza season in the EU/EEA countries. In addition, we wanted to compare how closely the circulating viruses resemble the viral components selected for seasonal influenza vaccines, and whether the circulating viruses had acquired resistance to commonly used antiviral drugs.MethodsWe performed a descriptive analysis of the influenza virus detections and characterisations reported by National Influenza Centres (NIC) from the 30 EU/EEA countries from week 40/2022 to week 39/2023 to The European Surveillance System (TESSy) as part of the Global Influenza Surveillance and Response System (GISRS).ResultsIn the EU/EEA countries, the 2022/23 influenza season was characterised by co-circulation of A(H1N1)pdm09, A(H3N2) and B/Victoria-lineage viruses. The genetic evolution of these viruses continued and clade 6B.1A.5a.2a of A(H1N1)pdm09, 3C.2a1b.2a.2b of A(H3N2) and V1A.3a.2 of B/Victoria viruses dominated. Influenza B/Yamagata-lineage viruses were not reported.DiscussionThe World Health Organization (WHO) vaccine composition recommendation for the northern hemisphere 2023/24 season reflects the European virus evolution, with a change of the A(H1N1)pdm09 component, while keeping the A(H3N2) and B/Victoria-lineage components unchanged.
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Affiliation(s)
- Eeva K Broberg
- European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | - Olov Svartström
- European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | - Maximilian Riess
- European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | - Annette Kraus
- European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | - Maja Vukovikj
- European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | - Angeliki Melidou
- European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
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Zhang Z, Tan J, Li Y, Zhou X, Niu J, Chen J, Sheng H, Wu X, Yuan Y. Bibliometric analysis of publication trends and topics of influenza-related encephalopathy from 2000 to 2022. Immun Inflamm Dis 2023; 11:e1013. [PMID: 37773718 PMCID: PMC10510462 DOI: 10.1002/iid3.1013] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 09/05/2023] [Indexed: 10/01/2023] Open
Abstract
BACKGROUND Influenza-related encephalopathy is a rapidly progressive encephalopathy that usually presents during the early phase of influenza infection and primarily manifests as central nervous system dysfunction. This study aimed to analyze the current research status and hotspots of influenza-related encephalopathy since 2000 through bibliometrics analysis. METHODS The Web of Science Core Collection (WOSCC) was used to extract global papers on influenza-related encephalopathy from 2000 to 2022. Meanwhile, the VOSviewer and CiteSpace software were used for data processing and result visualization. RESULTS A total of 561 published articles were included in the study. Japan was the country that published the most articles, with 205 articles, followed by the United States and China. Okayama University and Tokyo Medical University published the most articles, followed by Nagoya University, Tokyo University, and Juntendo University. Based on the analysis of keywords, four clusters with different research directions were identified: "Prevalence of H1N1 virus and the occurrence of neurological complications in different age groups," "mechanism of brain and central nervous system response after influenza virus infection," "various acute encephalopathy" and "diagnostic indicators of influenza-related encephalopathy." CONCLUSIONS The research progress, hotspots, and frontiers on influenza-related encephalopathy after 2000 were described through the visualization of bibliometrics. The findings will lay the groundwork for future studies and provide a reference for influenza-related encephalopathy. Research on influenza-related encephalopathy is basically at a stable stage, and the number of research results is related to outbreaks of the influenza virus.
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Affiliation(s)
- Zhengyu Zhang
- Medical Records Department, The First Affiliated HospitalZhejiang University School of MedicineHangzhouChina
| | - Juntao Tan
- Operation Management OfficeAffiliated Banan Hospital of Chongqing Medical UniversityChongqingChina
| | - Ying Li
- Department of Medical Administration, The First Affiliated HospitalZhejiang University School of MedicineHangzhouChina
| | - Xiumei Zhou
- Department of Infectious DiseasesPeople's Hospital of Pujiang CountyZhejiangChina
- PuJiang branch of the First Affiliated HospitalZhejiang University School of MedicineJinhuaChina
| | - Jianhua Niu
- Intensive Care Department, The First Affiliated HospitalZhejiang University School of MedicineHangzhouChina
| | - Jun Chen
- Lung Transplant Department, The First Affiliated HospitalZhejiang University School of MedicineHangzhouChina
| | - Hongfeng Sheng
- Department of OrthopedicsTongde Hospital of Zhejiang ProvinceHangzhouChina
| | - Xiaoxin Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious DiseasesThe First Affiliated Hospital, Zhejiang University School of Medicine, National Clinical Research Centre for Infectious DiseasesHangzhouZhejiangChina
| | - Yuan Yuan
- Medical Records DepartmentWomen and Children's Hospital of Chongqing Medical UniversityChongqingChina
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Soga T, Duong C, Pattinson D, Sakai-Tagawa Y, Tokita A, Izumida N, Nishino T, Hagiwara H, Wada N, Miyamoto Y, Kuroki H, Hayashi Y, Seki M, Kasuya N, Koga M, Adachi E, Iwatsuki-Horimoto K, Yotsuyanagi H, Yamayoshi S, Kawaoka Y. Characterization of Influenza A(H1N1)pdm09 Viruses Isolated in the 2018-2019 and 2019-2020 Influenza Seasons in Japan. Viruses 2023; 15:v15020535. [PMID: 36851749 PMCID: PMC9968111 DOI: 10.3390/v15020535] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 02/09/2023] [Accepted: 02/09/2023] [Indexed: 02/17/2023] Open
Abstract
The influenza A(H1N1)pdm09 virus that emerged in 2009 causes seasonal epidemic worldwide. The virus acquired several amino acid substitutions that were responsible for antigenic drift until the 2018-2019 influenza season. Viruses possessing mutations in the NA and PA proteins that cause reduced susceptibility to NA inhibitors and baloxavir marboxil, respectively, have been detected after antiviral treatment, albeit infrequently. Here, we analyzed HA, NA, and PA sequences derived from A(H1N1)pdm09 viruses that were isolated during the 2018-2019 and 2019-2020 influenza seasons in Japan. We found that A(H1N1)pdm09 viruses possessing the D187A and Q189E substitutions in HA emerged and dominated during the 2019-2020 season; these substitutions in the antigenic site Sb, a high potency neutralizing antibody-eliciting site for humans, changed the antigenicity of A(H1N1)pdm09 viruses. Furthermore, we found that isolates possessing the N156K substitution, which was predicted to affect the antigenicity of A(H1N1)pdm09 virus at the laboratory level, were detected at a frequency of 1.0% in the 2018-2019 season but 10.1% in the 2019-2020 season. These findings indicate that two kinds of antigenically drifted viruses-N156K and D187A/Q189E viruses-co-circulated during the 2019-2020 influenza season in Japan.
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Affiliation(s)
- Takuma Soga
- Division of Virology, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
| | - Calvin Duong
- Division of Virology, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
| | - David Pattinson
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Yuko Sakai-Tagawa
- Division of Virology, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
| | - Akifumi Tokita
- Tokyo Pediatric Association Public Health Committee, Saitama 331-0815, Japan
- Clinic Bambini, Tokyo 108-0071, Japan
| | - Naomi Izumida
- Tokyo Pediatric Association Public Health Committee, Saitama 331-0815, Japan
- Akebonocho Clinic, Tokyo 120-0023, Japan
| | - Tamon Nishino
- Tokyo Pediatric Association Public Health Committee, Saitama 331-0815, Japan
- Alpaca Kids ENT Clinic, Tokyo 171-0052, Japan
| | - Haruhisa Hagiwara
- Tokyo Pediatric Association Public Health Committee, Saitama 331-0815, Japan
- Hagiwara Clinic, Tokyo 173-0016, Japan
| | - Noriyuki Wada
- Tokyo Pediatric Association Public Health Committee, Saitama 331-0815, Japan
- Wada Pediatric Clinic, Tokyo 121-0812, Japan
| | | | | | - Yuka Hayashi
- Saitama Citizens Medical Center, Saitama 331-0054, Japan
| | - Masafumi Seki
- Division of Infectious Diseases and Infection Control, Tohoku Medical and Pharmaceutical University, Sendai 983-8536, Japan
| | | | - Michiko Koga
- Division of Infectious Diseases, Advanced Clinical Research Center, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
| | - Eisuke Adachi
- Department of Infectious Diseases and Applied Immunology, IMSUT Hospital of the Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
| | | | - Hiroshi Yotsuyanagi
- Department of Infectious Diseases and Applied Immunology, IMSUT Hospital of the Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
| | - Seiya Yamayoshi
- Division of Virology, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
- Department of Special Pathogens, International Research Center for Infectious Diseases, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
- Research Center for Global Viral Diseases, National Center for Global Health and Medicine Research Institute, Tokyo 162-8655, Japan
- Correspondence: (S.Y.); (Y.K.)
| | - Yoshihiro Kawaoka
- Division of Virology, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
- Department of Special Pathogens, International Research Center for Infectious Diseases, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
- Research Center for Global Viral Diseases, National Center for Global Health and Medicine Research Institute, Tokyo 162-8655, Japan
- The University of Tokyo Pandemic Preparedness, Infection and Advanced Research Center (UTOPIA), Minato-ku, Tokyo 108-8639, Japan
- Correspondence: (S.Y.); (Y.K.)
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Rosu ME, Lexmond P, Bestebroer TM, Hauser BM, Smith DJ, Herfst S, Fouchier RAM. Substitutions near the HA receptor binding site explain the origin and major antigenic change of the B/Victoria and B/Yamagata lineages. Proc Natl Acad Sci U S A 2022; 119:e2211616119. [PMID: 36215486 PMCID: PMC9586307 DOI: 10.1073/pnas.2211616119] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 09/13/2022] [Indexed: 11/18/2022] Open
Abstract
Influenza B virus primarily infects humans, causing seasonal epidemics globally. Two antigenic variants-Victoria-like and Yamagata-like-were detected in the 1980s, of which the molecular basis of emergence is still incompletely understood. Here, the antigenic properties of a unique collection of historical virus isolates, sampled from 1962 to 2000 and passaged exclusively in mammalian cells to preserve antigenic properties, were determined with the hemagglutination inhibition assay and an antigenic map was built to quantify and visualize the divergence of the lineages. The antigenic map revealed only three distinct antigenic clusters-Early, Victoria, and Yamagata-with relatively little antigenic diversity in each cluster until 2000. Viruses with Victoria-like antigenic properties emerged around 1972 and diversified subsequently into two genetic lineages. Viruses with Yamagata-like antigenic properties evolved from one lineage and became clearly antigenically distinct from the Victoria-like viruses around 1988. Recombinant mutant viruses were tested to show that insertions and deletions (indels), as observed frequently in influenza B virus hemagglutinin, had little effect on antigenic properties. In contrast, amino-acid substitutions at positions 148, 149, 150, and 203, adjacent to the hemagglutinin receptor binding site, determined the main antigenic differences between the Early, Victoria-like, and Yamagata-like viruses. Surprisingly, substitutions at two of the four positions reverted in recent viruses of the Victoria lineage, resulting in antigenic properties similar to viruses circulating ∼50 y earlier. These data shed light on the antigenic diversification of influenza viruses and suggest there may be limits to the antigenic evolution of influenza B virus.
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Affiliation(s)
- Miruna E. Rosu
- Department of Viroscience, Erasmus Medical Centre, Rotterdam 3015 CE, The Netherlands
| | - Pascal Lexmond
- Department of Viroscience, Erasmus Medical Centre, Rotterdam 3015 CE, The Netherlands
| | - Theo M. Bestebroer
- Department of Viroscience, Erasmus Medical Centre, Rotterdam 3015 CE, The Netherlands
| | - Blake M. Hauser
- Center for Pathogen Evolution, Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK
| | - Derek J. Smith
- Center for Pathogen Evolution, Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK
| | - Sander Herfst
- Department of Viroscience, Erasmus Medical Centre, Rotterdam 3015 CE, The Netherlands
| | - Ron A. M. Fouchier
- Department of Viroscience, Erasmus Medical Centre, Rotterdam 3015 CE, The Netherlands
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Kuliese M, Mickiene A, Jancoriene L, Zablockiene B, Gefenaite G. Age-Specific Seasonal Influenza Vaccine Effectiveness against Different Influenza Subtypes in the Hospitalized Population in Lithuania during the 2015-2019 Influenza Seasons. Vaccines (Basel) 2021; 9:vaccines9050455. [PMID: 34064455 PMCID: PMC8147944 DOI: 10.3390/vaccines9050455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 04/23/2021] [Accepted: 04/30/2021] [Indexed: 11/23/2022] Open
Abstract
Background: Continuous monitoring of seasonal influenza vaccine effectiveness (SIVE) is needed due to the changing nature of influenza viruses and it supports the decision on the annual update of vaccine composition. Age-specific SIVE was evaluated against different influenza subtypes in the hospitalized population in Lithuania during four influenza seasons. Methods: A test-negative case-control study design was used. SIVE and its 95% confidence intervals (95% CI) were calculated as (1 – odds ratio (OR)) × 100%. Results: Adjusted SIVE in 18–64-year-old individuals against influenza A, A(H1N1)pdm09 and B/Yamagata were 78.0% (95% CI: 1.7; 95.1%), 88.6% (95% CI: −47.4; 99.1%), and 76.8% (95% CI: −109.9; 97.4%), respectively. Adjusted SIVE in individuals aged 65 years and older against influenza A, influenza B, and B/Yamagata were 22.6% (95% CI: −36.5; 56.1%), 75.3% (95% CI: 12.2; 93.1%) and 73.1% (95% CI: 3.2; 92.5%), respectively. Unadjusted SIVE against influenza A(H3N2) among 18–64-year-old patients was 44.8% (95% CI: −171.0; 88.8%) and among those aged 65 years and older was 5.0% (95% CI: −74.5; 48.3%). Conclusions: Point estimates suggest high SIVE against influenza A in 18–64-year-old participants, and against influenza B and B/Yamagata in those 65 years old and older.
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Affiliation(s)
- Monika Kuliese
- Department of Infectious Diseases, Lithuanian University of Health Sciences, Baltijos Street 120, 47116 Kaunas, Lithuania; (A.M.); (G.G.)
- Correspondence:
| | - Aukse Mickiene
- Department of Infectious Diseases, Lithuanian University of Health Sciences, Baltijos Street 120, 47116 Kaunas, Lithuania; (A.M.); (G.G.)
| | - Ligita Jancoriene
- Clinic of Infectious Diseases and Dermatovenerology, Faculty of Medicine, Institute of Clinical Medicine, Vilnius University, Santariskiu Street 14, 08406 Vilnius, Lithuania; (L.J.); (B.Z.)
- Center of Infectious Diseases, Vilnius University Hospital Santaros Klinikos, Santariskiu Street 14, 08406 Vilnius, Lithuania
| | - Birute Zablockiene
- Clinic of Infectious Diseases and Dermatovenerology, Faculty of Medicine, Institute of Clinical Medicine, Vilnius University, Santariskiu Street 14, 08406 Vilnius, Lithuania; (L.J.); (B.Z.)
- Center of Infectious Diseases, Vilnius University Hospital Santaros Klinikos, Santariskiu Street 14, 08406 Vilnius, Lithuania
| | - Giedre Gefenaite
- Department of Infectious Diseases, Lithuanian University of Health Sciences, Baltijos Street 120, 47116 Kaunas, Lithuania; (A.M.); (G.G.)
- Department of Health Sciences, Faculty of Medicine, Lund University, Box 157, 22100 Lund, Sweden
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Characterizing genetic and antigenic divergence from vaccine strain of influenza A and B viruses circulating in Thailand, 2017-2020. Sci Rep 2021; 11:735. [PMID: 33437008 PMCID: PMC7803983 DOI: 10.1038/s41598-020-80895-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 12/30/2020] [Indexed: 01/29/2023] Open
Abstract
We monitored the circulating strains and genetic variation among seasonal influenza A and B viruses in Thailand between July 2017 and March 2020. The hemagglutinin gene was amplified and sequenced. We identified amino acid (AA) changes and computed antigenic relatedness using the Pepitope model. Phylogenetic analyses revealed multiple clades/subclades of influenza A(H1N1)pdm09 and A(H3N2) were circulating simultaneously and evolved away from their vaccine strain, but not the influenza B virus. The predominant circulating strains of A(H1N1)pdm09 belonged to 6B.1A1 (2017-2018) and 6B.1A5 (2019-2020) with additional AA substitutions. Clade 3C.2a1b and 3C.2a2 viruses co-circulated in A(H3N2) and clade 3C.3a virus was found in 2020. The B/Victoria-like lineage predominated since 2019 with an additional three AA deletions. Antigenic drift was dominantly facilitated at epitopes Sa and Sb of A(H1N1)pdm09, epitopes A, B, D and E of A(H3N2), and the 120 loop and 190 helix of influenza B virus. Moderate computed antigenic relatedness was observed in A(H1N1)pdm09. The computed antigenic relatedness of A(H3N2) indicated a significant decline in 2019 (9.17%) and 2020 (- 18.94%) whereas the circulating influenza B virus was antigenically similar (94.81%) with its vaccine strain. Our findings offer insights into the genetic divergence from vaccine strains, which could aid vaccine updating.
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