ETIDIOH - NEW

  The outbreak affecting captive birds was in an establishment with 4 laying hens , 1 cock and 1 runner duck located in Harju county, Viimsi parish . The outbreak was confirmed on the 9th of December 2025 based on analysis performed tracheal and brain samples at the National Centre for Laboratory Research and Risk Assessment, and in accordance with the case definition. Measures were only applied in the outbreak establishment. Based on a risk assessment, no restricted zone was established around the affected establishment in accordance with Article 21(3)(g). The establishment concerned kept only 6 captive birds and they had no direct or indirect contact with poultry or other establishments keeping captive birds . In the establishment, all captive birds were already dead. No culling was necessary. Preliminary cleaning and disinfection was applied. Source:  Link:  https://wahis.woah.org/#/in-review/7092 ____

  {England, Kent} Laying flock with around 31K birds. Samples taken were positive for HPAI H5N1. Birds presented clinical signs prior to testing. {England, Suffolk} Backyard flock. Samples taken were positive for HPAI H5N1. Birds presented clinical signs of AI prior to testing. Source:  Link:  https://wahis.woah.org/#/in-review/7081 ____

  Abstract Adding to the global burden of high pathogenicity avian influenza (HPAI) H5N1, an unprecedented five HPAI H7 outbreaks occurred globally in 2024 . Of these, three occurred in southeast Australia , with the independent emergence of HPAI H7N9, H7N8, and H7N3 , resulting in the destruction of 2 million poultry . Historical data demonstrates that H7 outbreaks in Australia do not occur randomly , rather, there is a strong association between the timing of the previous H7 outbreaks and rainfall patterns in southeastern Australia. We aimed to address a hypothesis wherein prior to H7 outbreaks in poultry, there was a detectable change in H7 prevalence and/or virus diversity in wild bird populations . We addressed this using virological and serological surveillance data generated from multiple programs. Despite the collection of thousands of samples, there was only weak evidence to support our hypothesis, which provides strong incentive to evaluate current surveillance approaches...

  A backyard, multi-species, farming operation was tested and confirmed positive for HPAI H5N1. Source:  Link:  https://wahis.woah.org/#/in-review/7072 ____

  Fattening birds suddenly dead. No biosecurity measures or vaccination plan. San Marcos Region. Source:  Link:  https://wahis.woah.org/#/in-review/7064 ____

  Within the epidemiological surveillance carried out by the Colombian Agricultural Institute (ICA) aimed at the early detection of clinical signs consistent with avian influenza, an outbreak of Highly Pathogenic Avian Influenza (HPAI) was confirmed in the village of Las Mercedes , in the municipality of Guaranda , in the department of Sucre . The event concerns non-poultry in a backyard , where respiratory and neurological signs were observed. The National Veterinary System activated epidemiological tracing and follow-up actions in the area of origin of the affected birds. As a control measure, the stamping out of the birds in the epidemiological unit was carried out and, as a complementary measure, epidemiological surveillance was strengthened in the surrounding area to identify other possible cases and prevent the spread of the disease. The affected population is composed of birds in a backyard not considered to be poultry which tested positive for Highly Pathogenic Avian Influe...

Farmed and  Backyard poultry in Uttarakhand State. Source:  Link:  https://wahis.woah.org/#/in-review/6804 ____

{Al-Anbar Region} During routine inspections of poultry houses by veterinarians, several cases were detected by rapid tests. Samples were then sent to the central laboratory for confirmation of infection. All disease control protocols were implemented, including restricting movement, culling both healthy and infected poultry, and disinfecting the premises. A follow-up report will be submitted. Source:  Link:  https://wahis.woah.org/#/in-review/7067 ____

  A poultry farm in Opolskie Region. Source:  Link:  https://wahis.woah.org/#/in-review/7037 ____

  A poultry farm in Oberösterreich Region. Source:  Link:  https://wahis.woah.org/#/in-review/7024 ____

A slaughter turkeys operation in Kujawsko-Pomorskie Region. Source: WOAH,  https://wahis.woah.org/#/in-review/7012 ____

  {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 ____

  {Porto Region} Small farm keeping 197 mixed species poultry and 187 captive birds of exotic species. Source: WOAH,  https://wahis.woah.org/#/in-review/7015 ____

  {Scotland} Broiler breeder flock of 28-week-old birds. Increased mortality and other clinical signs reported. Samples taken were found positive for HPAI H5N1. Source: WOAH,  https://wahis.woah.org/#/in-review/7013 ____

  Abstract H7 high-pathogenicity avian influenza (HPAI) virus outbreaks can cause high rates of morbidity and mortality in poultry flocks , leading to devastating impacts on poultry industries. In December 2024 , an HPAI virus was detected on a poultry farm in New Zealand , being the first time a case of HPAI was reported in the country. Whole-genome sequencing, subtyping, phylogenetic, and mutation analyses were performed to characterize the virus. Results indicated a novel high-pathogenicity H7N6 avian influenza virus arose through a reassortment event between endemic low-pathogenicity H4N6 and H7 viruses, followed by two mutations at the H7 gene cleavage site . Mutation analysis suggests the novel H7N6 virus exhibits increased risk of host specificity shift , but further work is required to fully understand the functional impacts of the detected mutational events. In this instance, a timely biosecurity response was effective in eliminating the virus and preventing its transmissi...

  A Slaughter geese operation in Mazowieckie Region. Source: WOAH,  https://wahis.woah.org/#/in-review/7008 ____

  Suspicion of avian influenza was raised at the Mirovice slaughterhouse. The suspicion concerned slaughtered ducks originating from a commercial fattening duck farm (Primary outbreak No. HPAI1-2/2025). A suspicion of HPAI was raised based on the pathological-anatomical findings and the information that there has been increased mortality in the farm. The official veterinary officer collected samples of ducks from the slaughterhouse for testing, which were sent by courier to the National Reference Laboratory, and issued preliminary veterinary measures for the slaughterhouse to prevent the spread of the disease. In connection with the suspicion of HPAI at the slaughterhouse (Secondary outbreak No. HPAI1-3/2025), commercial poultry farm with a fattening ducks. During the on-site inspection, it was found that the animals were dying massively (in total 2 700 birds and the high mortality still ongoing) and showing clinical signs (lethargy, ruffled feathers, and neurological symptoms). Th...

  A poultry farm in Csongrád-Csanád Region. Source: WOAH,  https://wahis.woah.org/#/in-review/7005 ____

  Abstract Between 2022 and 2025, high pathogenicity avian influenza (HPAI) H5N1 clade 2.3.4.4b was detected in poultry and wildlife across most countries in Central and South America . The epizootic peaked in 2023, subsided in 2024, and resurged in 2025 . In Central America , outbreaks in wildlife were few and small, and mostly affected pelicans . In contrast, South America experienced unprecedented mass mortality in colonial seabirds and pinnipeds , including endangered and endemic species. Notably, viral adaptation enabled mammal-to-mammal transmission in pinnipeds and rapid viral spread across multiple countries along the Pacific and Atlantic coasts . Subsequent introductions to subantarctic islands and Antarctica stemmed from South American viruses. In February 2025, a novel reassortant virus emerged, recombining HPAI H5N1 B3.2 genotype with South American low pathogenicity avian influenza viruses . In May 2025, HPAI H5N1 viruses re-emerged in Brazil , causing a series of outb...

{Northern Ireland} 56 week-old hens-table egg layers. Positive test for HPAI H5N1, clinical signs presented prior to testing. 10-week-old approx. turkey broilers. Positive test for HPAI H5N1, clinical signs presented prior to testing. Source: WOAH,  https://wahis.woah.org/#/in-review/7000 ____