Virus entity

Influenza A virus H9N2

Levelsubtype IAV H9N2

Recent evidence findings

Research Brief · Past 3 months 9

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3 literature 4 hosts 2 countries
Publication date Type Key finding PMID
2026-06 Recombination Or Reassortment The H6N2 GXG strain was identified as a triple-reassortant virus with its matrix gene derived from an H9N2 avian influenza virus. 41931194
2026-05-12 Outbreak Investigation An outbreak of H9N2 avian influenza virus occurred in lesser rhea in Peru, marking the first recorded natural infection in this avian species, with high mortality and genomic evidence of North American origin. 42182300
2026-05-12 Molecular Adaptation Comparative mutational analysis identified multiple mutations previously associated with mammalian host adaptation, increased virulence, and enhanced α2-6 receptor binding in H9N2 viruses from lesser rhea. 42182300
2026-05-12 Zoonotic Surveillance Phylogenetic analysis showed that the Peruvian H9N2 viruses were of North American origin, indicating a new introduction of this lineage into South America likely via migratory wild birds. 42182300
2026-05-08 Molecular Adaptation H9N2 swine isolates carried mammalian-adaptive residues in HA and PB2 and an antiviral resistance mutation in M2, suggesting adaptation to mammalian hosts. 42104325
2026-05-08 Recombination Or Reassortment The H9N2 swine isolates were reassortants containing gene segments from multiple H9N2 lineages. 42104325
2026-05-08 Host Range Experiment Mice infection experiments showed that the H9N2 swine isolates replicated efficiently in the respiratory tract but caused only mild pathology. 42104325
2026-05-08 Cross Species Transmission H9N2 avian influenza viruses were detected and isolated from swine, indicating infection of pigs by avian-origin influenza viruses. 42104325
2026-05-08 Zoonotic Surveillance Serological testing of 3,172 swine samples detected 0.44% H9N2 antibody prevalence, indicating low-level exposure in pigs. 42104325
Research Brief · Past month 1

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1 literature 1 hosts 1 countries
Publication date Type Key finding PMID
2026-06 Recombination Or Reassortment The H6N2 GXG strain was identified as a triple-reassortant virus with its matrix gene derived from an H9N2 avian influenza virus. 41931194
Research Brief · Past week 0

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0 literature 0 hosts 0 countries
Publication date Type Key finding PMID
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Evidence-related Animal

Evidence-related animal composition

24 animal taxa

Geographic evidence

Evidence distribution by country

13 countries

Temporal evidence

Evidence dynamics by year

130 year-type groups

Publication output

Literature publications by month

303 months