跟进：德州 Pecos County 一头麋鹿检出新世界螺旋蝇 为美国野生动物首例

华盛顿——美国农业部（USDA）动植物卫生检验局（APHIS）10月21日确认，美国首次在野生动物体内检出新世界螺旋蝇：感染个体是位于德克萨斯州 Pecos County 一处狩猎牧场的一头麋鹿（elk），由一名猎人猎获后上报，检验随后确认为新世界螺旋蝇感染。

APHIS 表示，德州动物卫生委员会将据此调整此前划定的一个感染区范围，农业部与德州公园和野生动物厅正在事发地区开展额外的野生动物监测。APHIS 称，这次检出显示猎人、土地所有者、户外活动者与野生动物从业人员在发现并阻断新世界螺旋蝇扩散方面作用关键，尽早报告是保护美国野生动物、家畜与宠物最重要的手段之一。

APHIS 列出狩猎季期间野外应留意的感染征象：伤口或身体孔口处可见的蛆虫（幼虫）、敞开流液或不断扩大的伤口、散发恶臭的创伤、动物显得虚弱、嗜睡、离群或痛苦，以及鼻、口、耳、眼、生殖器周围的感染迹象。APHIS 呼吁，发现可疑情况应立即报告，快速报告有助于主管部门及时响应、限制这种害虫扩散；野生动物识别与报告指引可查农业部的 Screwworm.gov 野生动物信息页。

新世界螺旋蝇是一种寄生性蝇类，其幼虫以温血动物的活体组织为食，对畜牧业与野生动物构成威胁。此前，农业部已宣布投入7.5亿美元，在德州 Edinburg 建设不育蝇工厂，以应对螺旋蝇北扩，工厂预计2027年春投产。

Follow-Up: New World Screwworm Confirmed in a Pecos County, Texas Elk, a First Detection in U.S. Wildlife

WASHINGTON — The U.S. Department of Agriculture's Animal and Plant Health Inspection Service (APHIS) confirmed on October 21 the first detection of New World screwworm (NWS) in wildlife in the United States, in an elk in Pecos County, Texas. The elk was located on a game ranch and was reported after being harvested by a hunter.

APHIS said the Texas Animal Health Commission will modify a previously established infested zone, and USDA and the Texas Parks and Wildlife Department are conducting additional wildlife surveillance in the area. The agency said the detection highlights the critical role hunters, landowners, outdoor enthusiasts and wildlife professionals play in helping detect and stop the spread of NWS, and that early reporting is one of the most important tools to protect wildlife, livestock and pets in the United States.

As hunting seasons continue across Texas and other states, APHIS urged hunters and others outdoors near infested areas to watch for visible maggots (larvae) in wounds or body openings; open, draining or enlarging wounds; foul-smelling injuries; animals that appear weak, lethargic, isolated or in distress; and signs of infestation around the nose, mouth, ears, eyes or genital areas. Anyone who sees anything suspicious should report it immediately, APHIS said, adding that its wildlife resources at Screwworm.gov provide identification signs and reporting guidance.

New World screwworm is a parasitic fly whose larvae feed on the living tissue of warm-blooded animals, threatening livestock and wildlife. USDA has previously announced a $750 million investment to build a sterile fly production facility in Edinburg, Texas, to counter the pest's northward spread, with operations expected to begin in spring 2027.

来源：GSM·美国（原文链接）

图片来源：图：新世界螺旋蝇幼虫特写，其口器上的獠状颚刺会啃食温血动物的活体组织。John Kucharski 摄，美国农业部农业研究局（ARS）公共领域图片（编号 K7576-1），经 Wikimedia Commons 发布。 / Close-up of a New World screwworm larva, whose tusklike mandibles rasp the flesh of living warm-blooded animals. Photo by John Kucharski, Agricultural Research Service, U.S. Department of Agriculture, public domain (image K7576-1), via Wikimedia Commons.

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