2026-09-11 / 路透社
[1/3]2026年8月19日，美国得州萨帕塔县牧场主里卡多·拉米雷斯的牧场内，一匹马站在畜栏中。路透社/丹尼尔·贝塞里尔
9月10日（路透社）——美国农业部数据显示，美国首例感染新大陆螺旋蝇的马匹在得州南部靠近墨西哥边境的地区被检出。
美国农业部官网信息显示，这起食肉寄生虫感染病例于周三在普雷西迪奥县确诊，此前美国本土牧场的牛群已遭数月虫害侵扰，引发了如何防控该害虫扩散的担忧。
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负责检测出该病例的得州动物健康委员会于周三发布命令，禁止将温血动物运出普雷西迪奥县和杰斐逊戴维斯县内指定的“受感染”区域。
上一次螺旋蝇疫情曾导致美国数千只动物死亡，该虫害在20世纪60年代被宣布根除。
得州是今年美国首批确认出现新动物感染病例的地区，专家估计，若疫情大范围扩散，可能给当地经济造成最高18亿美元的损失。
路透社上周报道称，包括马匹在内的走私动物可能成为新大陆螺旋蝇的宿主，相关担忧日益加剧。美国农业部和得州当局未说明受感染马匹的来源。
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组织美国马术公开赛的美国马术联合会表示，此次新发现的感染发生在一匹工作牧场马的后肢，但未提供更多细节。
该协会呼吁马主定期检查马匹。
“我们鼓励所有马主通过做好伤口护理、驱蝇和生物安全措施，帮助保护自己的马匹以及整个马术社区，”该协会在一份声明中说道。
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由卡桑德拉·加里森和达娜·贝丝·所罗门报道；林肯·菲斯特编辑。
我们的准则：汤森路透信托原则。
First US horse case of screwworm detected in Texas border county
2026-09-11 / Reuters
[1/3]A horse stands inside a corral on rancher Ricardo Ramirez’s property in Zapata, Texas, U.S., August 19, 2026. REUTERS/Daniel Becerril
Sept 10 (Reuters) – The first horse in the United States to be infected with New World screwworm has been detected in southern Texas near the Mexican border, data from the U.S. Department of Agriculture showed.
The case of the flesh-eating parasite was confirmed on Wednesday in Presidio County, showed the USDA website, after months of infestation of U.S. cattle that has raised alarms about how to control the spread of the pest.
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The Texas Animal Health Commission, which had detected the case, on Wednesday issued an order banning the movement of warm-blooded animals outside a designated “infested” zone within Presidio and Jeff Davis counties.
A previous screwworm outbreak killed thousands of animals in the U.S. before the pest was declared eradicated in the 1960s.
In Texas, where authorities confirmed the first new U.S. animal cases this year, experts estimate a widespread outbreak could cost the economy up to $1.8 billion.
Reuters reported last week on growing concerns that smuggled animals, including horses, could be possible hosts for New World screwworm. The USDA and Texas authorities did not address the origin of the affected horse.
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The U.S. Equestrian Federation, which organizes the U.S. Equestrian Open, said the newly detected infestation occurred in the hind limb of a working ranch horse, without providing further details.
It urged horse owners to regularly inspect their horses.
“We encourage every horse owner to help protect their horses and the broader equine community by practicing good wound care, fly control, and biosecurity,” the organization said in a statement.
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Reporting by Cassandra Garrison and Daina Beth Solomon; editing by Lincoln Feast.
Our Standards: The Thomson Reuters Trust Principles.
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