日本等多国暴发禽流感疫情

Group 1 - Japan's Okayama Prefecture confirmed a case of highly pathogenic avian influenza at a farm in Tsuyama, leading to the culling of approximately 430,000 egg-laying hens [1] - The farm reported multiple chicken deaths, with initial tests showing positive results for the avian influenza virus in seven deceased chickens [1] Group 2 - The United States reported its first human death from the H5N5 avian influenza strain, with a resident in Washington state succumbing to the virus on November 21 [2] - The patient, who had underlying health conditions, was believed to have contracted the virus through contact with backyard poultry [2] - H5 avian influenza is widely spread among wild birds globally, with H5N1 being the dominant strain in human infections, while H5N5 had not previously been reported in humans [2] Group 3 - Cambodia reported its first human death from avian influenza in the capital city of Phnom Penh this year, with a 22-year-old male succumbing to the H5N1 strain [3][4] - The patient exhibited symptoms such as fever, cough, and difficulty breathing, with health authorities investigating the source of infection and tracing contacts [4] Group 4 - The Netherlands confirmed its first case of a cat dying from H5N1 avian influenza, with a kitten found dead on a goat farm [5] - The kitten's siblings, after being given to new owners, also died, suggesting potential transmission of the virus, although the exact infection route remains uncertain [5]