美洲螺旋蝇在亚利桑那州感染一只狗，成为美国第三个受影响的州。该狗背部有伤口并寄生蛆虫，经检测确诊。
New World screwworm has infested a dog in Arizona, the third US state affected. The dog had a wound with maggots, and testing confirmed the case.
美国农业部正在案发区周边限制动物移动、加强检查并释放不育蝇。州兽医瑞安·沃尔克博士表示：“我们为此可能性准备了很长时间，正在迅速行动。”这种害虫在被根除数十年后再次蔓延，自6月以来美国已报告71例病例，其中18例仍在活跃。疫情还使与墨西哥的牲畜贸易复杂化，并增加了创纪录牛肉价格的压力。
The USDA is restricting animal movement near the area, stepping up checks, and releasing sterile flies. State vet Dr Ryan Wolker said: “We have been preparing for this possibility for a long while and are acting swiftly.”The outbreak is spreading again after decades of eradication, with 71 US cases since June and 18 active. It is also complicating livestock trade with Mexico and adding pressure to record beef prices.
AI生成 华盛顿——美国农业部10月28日表示，以温血动物活体为食的寄生蝇——美洲螺旋蝇在亚利桑那州感染一只狗，病例扩大至第三个美国州。
AI generated WASHINGTON - New World screwworm, a parasitic fly that eats warm-blooded animals alive, has infested a dog in Arizona, widening cases to a third US state, the US Department of Agriculture said on Oct 28.
据美国农业部称，亚利桑那州首例检出位于科奇斯县，该县与墨西哥接壤。
The first detection in Arizona was in Cochise County, which borders Mexico, according to the USDA.
亚利桑那州农业部表示，该狗背部伤口寄生蛆虫，符合螺旋蝇感染特征，科学检测已确诊。该部门补充说，该狗正在接受兽医治疗。
The dog had a wound on its back that was infested with maggots, consistent with screwworm, and scientific testing verified the infestation, the Arizona Department of Agriculture said. The dog was receiving veterinary care, it added.
州兽医瑞安·沃尔克博士在声明中说：“我们为此可能性准备了很长时间，正在迅速行动。”
“We have been preparing for this possibility for a long while and are acting swiftly,” state veterinarian Dr Ryan Wolker said in a statement.
亚利桑那州病例是这种害虫在美国被根除数十年后、尽管联邦努力遏制但可能正在重新站稳脚跟的最新迹象，这使美国农业部试图重启与墨西哥的牲畜贸易、在中期选举前缓解创纪录牛肉价格的努力更加复杂化。
The Arizona case marks the latest sign that screwworm, eradicated from the US decades ago, may be regaining a foothold despite federal efforts to contain it, complicating the USDA’s attempts to reopen livestock trade with Mexico and ease record beef prices ahead of the midterm elections.
美国农业部表示，针对这次感染，正在病例周围20公里范围内限制动物移动、加强活体动物监测并释放对抗螺旋蝇的不育蝇。
The USDA said it was restricting animal movement in a 20km zone around the case, increasing surveillance of live animals and releasing sterile flies that combat screwworm in response to the infestation.
该机构2025年暂停从墨西哥进口牲畜，试图阻挡螺旋蝇，后者已向北推进至墨西哥和拉丁美洲。
The agency halted livestock imports from Mexico in 2025 to try to keep out screwworm, which advanced north through Mexico and Latin America.
它在6月于得克萨斯州的一头小牛身上检测出螺旋蝇，随后又在得克萨斯州和新墨西哥州确认了更多病例。
It detected screwworm in a calf in Texas in June and then confirmed additional cases in Texas and New Mexico.
根据其网站，截至10月28日，该机构自6月以来已报告71例螺旋蝇病例，其中18例为活跃病例。自9月以来，感染病例激增，当时仅有两例活跃病例。
As of Oct 28, the agency had reported 71 screwworm cases since June, and 18 were active, according to its website. Infestations have multiplied since September, when there were only two active cases.
进口暂停助推美国牛肉供应收紧，将牛肉价格推至美国消费者的历史高位，引发了对中期选举前肉类负担能力的担忧。
The import halt helped tighten US cattle supplies and push beef prices to record highs for American consumers, raising concerns about affordability ahead of the midterm elections.
美国农业部于8月开始恢复从墨西哥进口牲畜，并已在亚利桑那州和新墨西哥州的三个入境口岸重启贸易。
The USDA began to resume livestock imports from Mexico in August and has restarted trade at three ports of entry in Arizona and New Mexico.
该机构表示，如果具备安全贸易条件，计划于11月30日在亚利桑那州诺加莱斯恢复从墨西哥进口牲畜。
The agency has said it next plans to resume imports from Mexico in Nogales, Arizona, on Nov 30, if conditions for safe trade are in place.
上周，美国农业部确认了美国野生动物中首例螺旋蝇病例，发现于得克萨斯州的一头麋鹿身上。
Last week, the USDA confirmed the first case of screwworm in US wildlife in an elk in Texas.