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Viruses
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H5N1 Influenza Viruses
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H5N1 Influenza Viruses

A special issue of Viruses (ISSN 1999-4915). This special issue belongs to the section "Animal Viruses".

Deadline for manuscript submissions: closed (31 March 2025) | Viewed by 4303

Special Issue Editor

Dr. Daniel R. Perez

E-Mail Website
Guest Editor
Poultry Diagnostic and Research Center, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
Interests: influenza viruses; emerging viruses; interspecies transmission of viral pathogens; virus entry and replication; virus host-range; virus ecology and evolution
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The global emergence and rapid spread of highly pathogenic avian influenza (HPAI) H5N1 virus has raised significant concerns for both animal and human health, necessitating a comprehensive understanding of this evolving threat. This Special Issue aims to provide a platform for disseminating cutting-edge research on H5N1, covering a wide range of critical topics. We encourage submissions that delve into the intricate virology of H5N1, exploring its genetic diversity, mutations, and the molecular mechanisms underlying its virulence and transmissibility. Epidemiological investigations are crucial to elucidate the complex transmission dynamics of H5N1, including spillover events from avian populations, geographic spread, and risk factors associated with human infection. 

Furthermore, we seek contributions that investigate the pathogenesis of H5N1 infection in diverse hosts, examining the immune responses elicited, the factors influencing disease severity, and the potential for zoonotic transmission. We are particularly interested in studies that address the development of effective vaccines and antiviral therapies, as well as innovative strategies for prevention and control. This Special Issue will serve as a valuable resource for researchers, public health officials, and policymakers working to mitigate the impact of H5N1 on global health and well-being.

Dr. Daniel R. Perez
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Viruses is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • H5N1
  • avian influenza
  • genetic diversity
  • immune response
  • vaccines and antiviral therapies

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Published Papers (3 papers)

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Research

13 pages, 1494 KiB  
Article
Dose-Dependent Effect of DNA Vaccine pVAX-H5 Encoding a Modified Hemagglutinin of Influenza A (H5N8) and Its Cross-Reactivity Against A (H5N1) Influenza Viruses of Clade 2.3.4.4b
by Andrey P. Rudometov, Victoria R. Litvinova, Andrei S. Gudymo, Ksenia I. Ivanova, Nadezhda B. Rudometova, Denis N. Kisakov, Mariya B. Borgoyakova, Lyubov A. Kisakova, Vladimir A. Yakovlev, Elena V. Tigeeva, Danil I. Vahitov, Kristina P. Makarova, Natalia P. Kolosova, Tatiana N. Ilyicheva, Vasiliy Yu. Marchenko, Artemiy A. Sergeev, Larisa I. Karpenko and Alexander A. Ilyichev
Viruses 2025, 17(3), 330; https://doi.org/10.3390/v17030330 - 27 Feb 2025
Viewed by 627
Abstract
Highly pathogenic avian influenza (HPAI) H5 clade 2.3.4.4b viruses are widespread in wild and domestic birds, causing severe economic damage to the global poultry industry. Moreover, viruses of this clade are known to cause infections in mammals, posing a potential pandemic threat. Due [...] Read more.
Highly pathogenic avian influenza (HPAI) H5 clade 2.3.4.4b viruses are widespread in wild and domestic birds, causing severe economic damage to the global poultry industry. Moreover, viruses of this clade are known to cause infections in mammals, posing a potential pandemic threat. Due to the ongoing evolution and change in the dominant strains of H5 clade 2.3.4.4b, it is important to investigate the cross-reactivity of vaccines in use and under development against clade 2.3.4.4b viruses. In this study, the immunogenicity of the previously developed DNA vaccine encoding a modified hemagglutinin of the influenza A/turkey/Stavropol/320-01/2020 (H5N8) virus, administered by jet injection at doses of 1, 10, 50, 100, and 200 μg, was investigated. The highest titer of specific to recombinant hemagglutinin antibodies was detected in the group of animals injected with 100 µg of DNA vaccine. The cross-reactivity study of sera of animals immunized with 100 µg of DNA vaccine in a microneutralization assay against the strains A/chicken/Astrakhan/321-05/2020 (H5N8), A/chicken/Komi/24-4V/2023 (H5N1), and A/chicken/Khabarovsk/24-1V/2022 (H5N1) showed the formation of cross-neutralizing antibodies. Moreover, the study of protective properties showed that the DNA vaccine protected animals from mortality after infection with A/chicken/Khabarovsk/24-1V/2022 (H5N1) virus. Full article
(This article belongs to the Special Issue H5N1 Influenza Viruses)
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13 pages, 1460 KiB  
Article
Risk Assessment of Spread of the Influenza A Virus in Cows in South Bulgaria
by Gabriela Goujgoulova and Koycho Koev
Viruses 2025, 17(2), 246; https://doi.org/10.3390/v17020246 - 11 Feb 2025
Viewed by 762
Abstract
In this article, we present an assessment of the risk of the potential introduction and spread of highly pathogenic avian influenza (HPAI) in cows in Bulgaria. In the spring of 2024, we witnessed an unprecedented spread of the virus in dairy herds in [...] Read more.
In this article, we present an assessment of the risk of the potential introduction and spread of highly pathogenic avian influenza (HPAI) in cows in Bulgaria. In the spring of 2024, we witnessed an unprecedented spread of the virus in dairy herds in the USA. This crossing of interspecies barriers by the virus creates a real danger of pandemic manifestations in humans. The continued spread of H5N1 clade 2.3.4.4b in dairy populations and other mammalian species and efficient animal-to-animal transmission increases the risk of infection and subsequent spread of the virus in human populations. According to registers, as of 1 November 2022, a total of 559,544 cattle were bred in Bulgaria. The total number of dairy cows decreased by 5.2% year-on-year to 197,996. Farms breeding dairy cows as of 1 November 2022 were 12,439, which is 22.1% less than the previous year. The production of cow’s milk in 2022 amounted to 748,278 thousand liters. Traditionally, the largest share in the total yield of cow’s milk is occupied by the south-central region with 25.9%, followed by the southeastern region with 18.5%. Due to potential risk factors such as the high concentration of dairy cows in high-risk areas for avian influenza A, the possibility of HPAI jumping the interspecies barrier and spreading in dairy herds in Bulgaria is very high. We therefore set out to assess the risk of virus penetration in these herds. Full article
(This article belongs to the Special Issue H5N1 Influenza Viruses)
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12 pages, 1328 KiB  
Article
Highly Pathogenic Avian Influenza Contributes to the Population Decline of the Peregrine Falcon (Falco peregrinus) in The Netherlands
by Valentina Caliendo, Beatriz Bellido Martin, Ron A. M. Fouchier, Hans Verdaat, Marc Engelsma, Nancy Beerens and Roy Slaterus
Viruses 2025, 17(1), 24; https://doi.org/10.3390/v17010024 - 27 Dec 2024
Cited by 1 | Viewed by 2324
Abstract
Highly pathogenic avian influenza (HPAI) epizootics have caused repeated mass mortality events among wild birds. The effect of the infection is potentially detrimental for a variety of bird species, including the Peregrine Falcon (Falco peregrinus). The numbers of wintering and breeding [...] Read more.
Highly pathogenic avian influenza (HPAI) epizootics have caused repeated mass mortality events among wild birds. The effect of the infection is potentially detrimental for a variety of bird species, including the Peregrine Falcon (Falco peregrinus). The numbers of wintering and breeding Peregrine Falcons in the Netherlands have recently declined. We investigated the changes in population trends in relation to HPAI H5 virus outbreaks. For this purpose, we analyzed variations in annual numbers of wintering and breeding birds, the virology of reported dead birds, and the presence of the HPAI H5 virus in unhatched eggs. We showed that significant mortalities of Peregrine Falcons had occurred in 2016–2017 and 2020–2023, years of major HPAI H5 virus outbreaks. In particular, the highest rates of bird mortality and HPAI virus infection were reported in 2023. In this year, over 80% (28/32) of the tested birds were positive for HPAI H5 virus. No HPAI H5 virus was present in the eggs. Based on these findings, we concluded that HPAI represents a serious threat to the Peregrine Falcon population in the Netherlands, and, in combination with anthropogenic factors, may contribute to the decline of this species. Targeted HPAI surveillance and disease mitigation measures are necessary for the conservation of this species. Full article
(This article belongs to the Special Issue H5N1 Influenza Viruses)
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