ETIDIOH - NEW

  Abstract In autumn 2025, an unprecedented mass mortality event was observed among the western migrating subpopulation of Eurasian cranes (Grus grus) in Germany . Systemic infection with highly pathogenic avian influenza virus H5N1 , clade 2.3.4.4b, genotype DI.2.1, was identified as the cause of acute death. The gregarious behavior of cranes at feeding and resting sites likely has contributed to the rapid and massive dissemination of viruses within the crane population. Competing Interest Statement The authors have declared no competing interest. Funder Information Declared European Union, 101084171 Source:  Link:  https://www.biorxiv.org/content/10.64898/2025.12.08.692485v1 ____

{Excerpt} Several cats in Neuruppin have been infected with avian influenza , according to the Ostprignitz-Ruppin district administration . They have been taken into the care of the Office for Consumer Protection and Agriculture, the district announced. A cat infected with the H5N1 strain of the avian influenza virus was found dead in a wooded area near the town. Several media outlets have reported on this.  (...) Source:  Link:  https://www.tagesspiegel.de/berlin/vogelgrippe-in-brandenburg-katzen-mit-geflugelpest-infiziert--warnung-vom-kreis-15014940.html ____

  {Hessen Region} laying hens (500), broilers (200), ducks for fattening (200), geese for fattening (700), turkeys for fattening (500) Source: WOAH,  https://wahis.woah.org/#/in-review/7021 ____

  A poultry farm in Sachsen Region. Source: WOAH,  https://wahis.woah.org/#/in-review/7002 ____

  A laying hens farm in Sachsen-Anhalt Region. Source: WOAH,  https://wahis.woah.org/#/in-review/6966 ____

A wild bird from Gruidae Spp. in Saarland Region. Source WOAH,  https://wahis.woah.org/#/in-review/6940 ____

  {Di Frank Liebig - Archiv Frank Liebig, CC BY-SA 3.0 de, https://commons.wikimedia.org/w/index.php?curid=56812600 } Wild birds belonging to the Gruidae Species in Berlin Region. Source: WOAH,  https://wahis.woah.org/#/in-review/6938 ____

{Baden-Württemberg] Turkeys for fattening (1200), ducks for fattening (2400), geese for fattening (1200), broilers (6500), laying hens (4000). Source: WOAH,  https://wahis.woah.org/#/in-review/6927 ____

  A poultry farm in Niedersachsen Region. Source: WOAH,  https://wahis.woah.org/#/in-review/6892 ____

  A poultry farm in Brandenburg Region. Source: WOAH,  https://wahis.woah.org/#/in-review/6878 ____

  New human cases {1,2}:  -- From 26 August to 29 September 2025 , based on reporting date, the detection of influenza A(H5) in one human , influenza A(H5N1) in one human , influenza A(H9N2) in eight humans and an influenza A(H1N1) variant ((H1N1)v) virus in one human were reported officially.   Circulation of influenza viruses with zoonotic potential in animals :  -- High pathogenicity avian influenza (HPAI) events in poultry and non-poultry animal species continue to be reported to the World Organisation for Animal Health (WOAH).{3}  -- The Food and Agriculture Organization of the United Nations (FAO) also provides a global update on avian influenza viruses with pandemic potential.{4}  Risk assessment {5}:  -- Sustained human to human transmission has not been reported from these events.  -- Based on information available at the time of this risk assessment update , the overall public health risk from currently known influenza A viruses d...

  A geese for fattening farm in Bayern Region. Source: WOAH,  https://wahis.woah.org/#/in-review/6879 ____

  A poultry farm in Thüringen Region. Source: WOAH,  https://wahis.woah.org/#/in-review/6844 ____

  Abstract In North-East Germany's offshore islands and mainland coast, wild ruminants, boar, and carnivores were tested for H5-HPAI antibodies . Wild ruminants were seronegative ; 3.5% of boar and 12.5-21.9% of carnivores were seropositive , evidencing frequent spillover . Because such events may accelerate mammalian - and ultimately human - adaptation , sustained One-Health monitoring is essential. Competing Interest Statement The authors have declared no competing interest. Funder Information Declared European Union, 101084171 "KAPPA-FLU" Helmholtz Institute for One Health, WiMoPOH Source: BioRxIV,  https://www.biorxiv.org/content/10.1101/2025.09.30.678011v1 ____

  A laying hens farm in Nordrhein-Westfalen Region. Source: WOAH,  https://wahis.woah.org/#/in-review/6832 ____

  Abstract Since winter 2022/23, high pathogenicity avian influenza virus (HPAIV) H5N1 clade 2.3.4.4b, genotype euBB, has caused extensive mortality among wild birds . This genotype emerged in France in spring 2022 through reassortment between a gull-adapted low-pathogenicity virus and HPAIV H5N1. Phylogeographic and spatiotemporal analyses show that transmission into German breeding colonies of black-headed gulls (Chroicocephalus ridibundus) and common terns (Sterna hirundo) involved multiple independent incursions, likely via black-headed gulls returning from wintering grounds in the Netherlands, Belgium, and France . It spilled over into common terns, which breed in shared colonies with black-headed gulls, and led to high adult mortality in both species in 2023 (at least 8,137 black-headed gulls and 614 common terns; >3% of the breeding population), followed by significant breeding pair declines in 2024 (-15.9% in black-headed gulls, -5.8% in common terns). Increased immunity...

Ducks for fattening (1800), geese for fattening (100) in Mecklenburg-Vorpommern Region. Laying hens (150). ducks for fattening (2800), geese for fattening (2900) in Mecklenburg-Vorpommern Region. Source: WOAH,  https://wahis.woah.org/#/in-review/6780 ____

  A poultry farm in Schleswig-Holstein State. Source: WOAH,  https://wahis.woah.org/#/in-review/6760 ____

  By Benedikt Dohmen (User:Benedictus), Archiv-Nr. 92/39 - Own work, CC BY-SA 3.0,  https://commons.wikimedia.org/w/index.php?curid=496875 Source: Wikipedia,  https://en.wikipedia.org/wiki/DB_Class_VT_11.5 ____

One red fox in Sachsen and one in Nordrhein-Westfalen States. Source: WOAH,  https://wahis.woah.org/#/in-review/6398 ____