#Mongolia - #Influenza A #H5N1 viruses of high pathogenicity (Inf. with) (non-poultry including wild birds) (2017-) - Immediate notification

 

Wild Whooper Swans in the Arhangay Region.

Source: WOAH, https://wahis.woah.org/#/in-review/7007

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#Perpetuation of Avian #Influenza from Molt to Fall #Migration in Wild Swan #Geese (Anser cygnoides): An Agent-Based Modeling Approach

Abstract

Wild waterfowl are considered to be the reservoir of avian influenza, but their distinct annual life cycle stages and their contribution to disease dynamics are not well understood. Studies of the highly pathogenic avian influenza (HPAI) virus have primarily focused on wintering grounds, where human and poultry densities are high year-round, compared with breeding grounds, where migratory waterfowl are more isolated. Few if any studies of avian influenza have focused on the molting stage where wild waterfowl congregate in a few selected wetlands and undergo the simultaneous molt of wing and tail feathers during a vulnerable flightless period. The molting stage may be one of the most important periods for the perpetuation of the disease in waterfowl, since during this stage, immunologically naïve young birds and adults freely intermix prior to the fall migration. Our study incorporated empirical data from virological field samplings and markings of Swan Geese (Anser cygnoides) on their breeding grounds in Mongolia in an integrated agent-based model (ABM) that included susceptible–exposed–infectious–recovered (SEIR) states. Our ABM results provided unique insights and indicated that individual movements between different molting wetlands and the transmission rate were the key predictors of HPAI perpetuation. While wetland extent was not a significant predictor of HPAI perpetuation, it had a large effect on the number of infections and associated death toll. Our results indicate that conserving undisturbed habitats for wild waterfowl during the molting stage of the breeding season could reduce the risk of HPAI transmission.

Source: Viruses, https://www.mdpi.com/1999-4915/17/2/196

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#Mongolia - #Influenza A #H5N1 viruses of high pathogenicity (Inf. with) (non-poultry including wild birds) (2017-) - Immediate notification [FINAL]

Active surveillance for avian influenza was conducted in October 2024 at Ganga Lake, located in the eastern region of Mongolia along the East Asian-Australasian Flyway for migratory birds. During the surveillance period, no clinical signs of disease or mortality were observed among wild birds. However, qRT-PCR analysis using H5-specific primers for fecal samples, followed by sequencing, confirmed the detection of the Highly Pathogenic Avian Influenza (HPAI) H5N1 subtype.

Source: WOAH, https://wahis.woah.org/#/in-review/6193

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Evidence of #Influenza A(#H5N1) #Spillover #Infections in #Horses, #Mongolia

Abstract

Recent outbreaks of influenza A(H5N1) have affected many mammal species. We report serologic evidence of H5N1 virus infection in horses in Mongolia. Because H3N8 equine influenza virus is endemic in many countries, horses should be monitored to prevent reassortment between equine and avian influenza viruses with unknown consequences.

Source: Emerging Infectious Diseases Journal, https://wwwnc.cdc.gov/eid/article/31/1/24-1266_article

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