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Two genotypes of H3N2 swine influenza viruses identified in pigs from Shandong Province, China.
Front Cell Infect Microbiol
January 2025
College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an, China.
Swine influenza virus (SIV) is a highly contagious pathogen that poses significant economic challenges to the swine industry and carries zoonotic potential, underscoring the need for vigilant surveillance. In this study, we performed a comprehensive genetic and molecular analysis of H3N2 SIV isolates obtained from 372 swine samples collected in Shandong Province, China. Phylogenetic analysis revealed two distinct genotypes.
View Article and Find Full Text PDFZoonotic transmission of novel Influenza A variant viruses detected in Brazil during 2020 to 2023.
Nat Commun
December 2024
Laboratório de Vírus Respiratórios, Exantemáticos, Enterovírus e Emergências (LVRE), Oswaldo Cruz Foundation, Fiocruz, Rio de Janeiro, Brazil.
Zoonotic infections (swine-human) caused by influenza A viruses (IAVs) have been reported and linked to close contact between these species. Here, we describe eight human IAV variant infections (6 mild and 2 severe cases, including 1 death) detected in Paraná, Brazil, during 2020-2023. Genomes recovered were closely related to Brazilian swIAVs of three major lineages (1 A.
View Article and Find Full Text PDFImmunization and challenge trials in a murine model using different inactivated recombinant vaccines against H1N1 swine influenza virus circulating in Brazil.
Vaccine
December 2024
Department of Preventive Veterinary Medicine, Veterinary School, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil. Electronic address:
In Brazil, at least four lineages of influenza A virus circulate pig population: 2009 H1N1 flu pandemic (pH1N1), human-seasonal origin H3N2, H1N1 and H1N2 (huH1 lineages) viruses. Studies related to the occurrence of swine influenza A virus (SIAV) in Brazilian herds have been detecting an increase of occurrence of huH1 lineages. This study aimed to construct recombinant vaccines against the huH1N1 virus and test the immunogens in a murine model.
View Article and Find Full Text PDFMeta-Analysis of Seroprevalence and Prevalence of Influenza A Viruses (Subtypes H3N2, H3N8, and H1N1) in Dogs.
Animals (Basel)
December 2024
Departamento de Medicina y Zootecnia de Cerdos, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico.
Influenza A is a zoonotic disease that affects dogs, pigs, horses, poultry, and birds. In this report, a meta-analysis according to PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) was conducted. Studies of influenza A viruses in dogs providing prevalence or seroprevalence in any location worldwide were included.
View Article and Find Full Text PDFStochastic Models of Zoonotic Avian Influenza with Multiple Hosts, Environmental Transmission, and Migration in the Natural Reservoir.
Bull Math Biol
December 2024
Department of Mathematics and Statistics, Texas Tech University, Lubbock, TX, 79409, USA.
Avian influenza virus type A causes an infectious disease that circulates among wild bird populations and regularly spills over into domesticated animals, such as poultry and swine. As the virus replicates in these intermediate hosts, mutations occur, increasing the likelihood of emergence of a new variant with greater transmission to humans and a potential threat to public health. Prior models for spread of avian influenza have included some combinations of the following components: multi-host populations, spillover into humans, environmental transmission, seasonality, and migration.
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