Bird Flu Spread Continues: Cambodia Reports 14th H5N1 Case While Global Animal Outbreaks Surge in 2025

Bird Flu Bulletin: Daily H5N1 Update Friday, August 29, 2025 Good afternoon. This is Bird Flu Bulletin: Daily H5N1 Update for Friday, August 29, 2025, bringing you the latest on avian influenza developments worldwide. Top stories today: First, heightened surveillance continues in Cambodia following the recent hospitalization of a man with confirmed H5N1 infection. CIDRAP reports that this is Cambodia’s fourteenth case this year, including eight fatalities. All infections were traced to direct contact with poultry or wild birds. Health officials stress there is no evidence of human-to-human transmission, and public health risk remains low globally, though risk is higher for those frequently exposed to infected animals. Second, new animal outbreaks have emerged in multiple regions. According to the latest joint risk assessment from the UN Food and Agriculture Organization, the World Health Organization, and the World Organization for Animal Health, between March and July 2025, 807 additional outbreaks in animals were reported worldwide. These span poultry, wild birds, and mammals including domestic cats and marine mammals like harbor seals and sea otters. The majority of animal cases involve highly pathogenic H5N1 clades 2.3.2.1 and 2.3.4.4 now circulating in Asia, Europe, and the Americas. Third, as of this morning, confirmed human H5N1 cases globally stand at 26 for the year, with the most recent uptick in Southeast Asia. The CDC notes no new cases recorded in the United States since mid-February. The international tally includes 11 deaths so far in 2025, predominantly in Cambodia. When compared to yesterday, reported numbers remain unchanged; no new human cases have been logged since the Cambodian case earlier this week. Guidance update: The CDC and WHO continue to recommend stringent precautions for anyone handling sick or dead birds, particularly in outbreak zones. The AMA emphasizes accelerated subtyping of Influenza A in hospitalized patients and reiterates that the risk for the wider public remains low. Authorities advise wearing personal protective equipment when interacting with potentially infected birds or mammals, especially in agricultural settings. Expert insight: To better understand the landscape, we spoke with Dr. Mira Chang, infectious disease specialist and advisor to the FAO One Health program. Dr. Chang emphasized: “While sporadic human cases from animal exposure are expected, close monitoring of virus evolution and ongoing integration of animal and human health data are essential to detecting any shift toward easier human transmission. Global cooperation is vital to keeping risk low.” Looking ahead: Tomorrow we expect additional reports from the WOAH tracking emerging outbreaks in both poultry and wild birds, particularly in the Americas and Southeast Asia. Public health agencies will provide updated guidance on occupational safety for farm and wildlife professionals. Surveillance efforts will likely expand, with This content was created in partnership and with the help of Artificial Intelligence AI.