华盛顿州两奶牛群确认感染禽流感，为该州牲畜首例
据Capital Press报道，美国农业部10月8日确认，华盛顿州亚基马县两个奶牛群检出H5N1禽流感——这是该州牲畜首例，也是自2024年3月疫情爆发以来全美第19个受影响的州。
国家兽医服务实验室确认了检测结果。两个农场已被隔离并实施严格生物安全措施。州官员强调，巴氏杀菌牛奶仍然安全，牛奶供应无虞。
华盛顿州农业厅与华盛顿州立大学两年来已开展7,000多次监测，此前全部为阴性。基因测序正在进行中，以确定毒株类型。
奶牛感染症状包括产奶量下降、奶变稠发黄。华盛顿州奶业联合会的里克·内雷布特表示，病牛通常约6周康复，患病期间产奶量下降10%至15%。
Bird Flu Confirmed in Two Yakima County Dairy Herds, a First for Washington Livestock
The U.S. Department of Agriculture confirmed on October 8 that H5N1 bird flu has been detected in two dairy herds in Yakima County — the first cases in Washington livestock and the 19th state affected since the outbreak began in March 2024, Capital Press reported.
The National Veterinary Services Laboratories confirmed the detections. Both farms have been quarantined under strict biosecurity. State officials stressed that pasteurized milk remains safe and that the milk supply is not at risk.
The Washington State Department of Agriculture and Washington State University have conducted more than 7,000 surveillance tests over two years — all negative until now. Genetic sequencing is underway to determine the strain.
Symptoms in cows include reduced milk production and thickened, yellowish milk. Rick Naerebout of the Washington State Dairy Federation said affected cows typically recover in about six weeks, with milk output dropping 10 to 15 percent during illness.
图片来源：奶牛群在牛舍饲喂，图片来源：sacratomato_hr / Wikimedia Commons（CC BY-SA 2.0）
