2026-09-17 23:55:22 UTC / 路透社
作者：汤姆·波兰塞克
2026年9月17日 世界标准时间23:55 更新于2分钟前
2025年7月4日，墨西哥恰帕斯州塔帕丘拉，墨西哥政府和牧场主努力控制这种食肉害虫的扩散时，兽医诊所展示了早晨采集的螺旋锥蝇样本。路透社/丹尼尔·贝塞里尔/档案照片 购买授权，将在新标签页打开
芝加哥，9月17日（路透社）——美国周四在新墨西哥州的一匹马身上确认了新大陆螺旋锥蝇感染病例，此时美国联邦政府正准备恢复墨西哥牲畜向该州的进口，此前美国曾为阻挡这种食肉寄生虫而暂停了相关贸易。
美国农业部官网消息显示，新墨西哥州靠近墨西哥边境西南部的格兰特县出现一例螺旋锥蝇感染马匹的病例。这是自6月螺旋锥蝇从墨西哥传入美国以来，该州第二起确诊病例。
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美国农业部长布鲁克·罗林斯周三表示，美国农业部正准备于下周重新开放新墨西哥州的一个牲畜入境口岸，该口岸此前因螺旋锥蝇疫情而关闭。
新墨西哥州农业部发言人珍妮·格林周四表示，她目前无法提供最新病例是否会影响相关计划的即时更新。美国农业部未立即回应置评请求。
美国去年暂停了从墨西哥进口牲畜以阻挡螺旋锥蝇，并于上月在亚利桑那州的一个口岸恢复了贸易，作为分阶段重启计划的一部分。此次暂停贸易导致美国牛肉供应收紧，并推高牛肉价格至美国消费者面临的历史新高。
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罗林斯周四在新墨西哥州圣特雷莎口岸举行新闻发布会，讨论9月24日恢复该口岸贸易的计划。新墨西哥州农业部表示，发布会召开时，这起马匹感染病例尚未得到确认。
上周，美国在墨西哥边境附近的德克萨斯州南部发现首例感染螺旋锥蝇的马匹。
路透社此前曾报道，包括马匹在内的走私动物可能成为螺旋锥蝇的宿主，引发了日益严重的担忧。格林表示，官员们正在调查新墨西哥州这匹马的感染途径。
根据美国农业部的数据，美国目前有三起活跃的螺旋锥蝇感染病例，包括新墨西哥州和德克萨斯州的马匹，以及德克萨斯州的一只狗。上一次螺旋锥蝇疫情曾导致美国数千只动物死亡，直到该害虫在20世纪60年代被宣布根除。
报道：汤姆·波兰塞克；编辑：斯蒂芬·科茨
我们的准则：路透社汤姆森路透信托原则。
Screwworm infests US horse before port reopens to Mexican livestock
2026-09-17 23:55:22 UTC / Reuters
By Tom Polansek
September 17, 2026 11:55 PM UTC Updated 2 mins ago
A sample of screwworms collected in the morning are displayed at the veterinary clinic as the Mexican government and ranchers struggle to control the spread of this flesh-eating pest, in Tapachula, Chiapas state, Mexico July 4, 2025. REUTERS/Daniel Becerril/File Photo Purchase Licensing Rights, opens new tab
CHICAGO, Sept 17 (Reuters) – The U.S. confirmed a case of New World screwworm in a horse in New Mexico on Thursday, as the federal government prepared to resume imports of Mexican livestock into the state after blocking trade in an attempt to keep out the flesh-eating parasite.
Screwworm infested a horse in Grant County, New Mexico, in the southwest corner of the state near the Mexican border, according to the U.S. Department of Agriculture’s website. It was the state’s second confirmed case since screwworm entered the U.S. from Mexico in June.
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U.S. Agriculture Secretary Brooke Rollins said on Wednesday that USDA was preparing to reopen a New Mexico port of entry to livestock trade next week after it was closed because of screwworm.
Jenny Green, a spokesperson for the New Mexico Department of Agriculture, said on Thursday she had no immediate update about whether the latest case would affect those plans. USDA did not immediately respond to a request for comment.
The U.S. halted livestock imports from Mexico last year to keep out screwworm but resumed trade last month at an Arizona port as part of a phased reopening plan. The halt helped tighten U.S. cattle supplies and push beef prices to record highs for American consumers.
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Rollins held a news conference at the Santa Teresa, New Mexico, port on Thursday to discuss plans to reopen trade there on September 24. The horse case had not been confirmed at the time of the news conference, the New Mexico Department of Agriculture said.
Last week, the first U.S. horse to be infested with screwworm was detected in southern Texas near the Mexican border.
Reuters has reported on growing concerns that smuggled animals, including horses, could be possible hosts for screwworm. Green said officials were investigating how the horse in New Mexico became infested.
The U.S. has three active screwworm cases, including the horses in New Mexico and Texas and a dog in Texas, according to USDA. A previous screwworm outbreak killed thousands of animals in the U.S. before the pest was declared eradicated in the 1960s.
blob:https://www.reuters.com/ce3df9fc-0b17-4a1d-b743-8d65a70de698
Reporting by Tom Polansek; Editing by Stephen Coates
Our Standards: The Thomson Reuters Trust Principles.
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