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#Japan - High pathogenicity avian #influenza viruses (#poultry) (Inf. with) - Immediate notification

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By G.M.



{ob1-Shiraoi-Town} On 21 October 2025, a Livestock Hygiene Service Centre (LHSC) in Hokkaido Prefecture received a notification from a domestic layer farm regarding an increase in bird mortality. Samples were collected from birds on the farm by LHSC officers and tested positive for influenza A virus using a viral antigen rapid test. On 22 October, the LHSC conducted RT-PCR and rRT-PCR tests and confirmed that the virus is of high pathogenicity. Movement and shipment restriction have been imposed on farms within a radius of 3 km and 10 km of the affected farm, respectively. Stamping-out and relevant control measures, including disinfection, are ongoing. The National Institute of Animal Health (NIAH) is sequencing the virus genome and will identify the subtype.

Source: WOAH, https://wahis.woah.org/#/in-review/6911

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