想在万圣节体验真正的惊悚，不妨把目光投向南部边境，那里贪婪的食肉蛆虫正在滋生蔓延，并开始啃食人们的宠物。
For a genuine fright this Halloween, you can turn your gaze to the southern border, where ravenous, flesh-eating maggots are festering and have taken to eating people's pets.
本周，美国的新世界螺旋蝇（NWS）疫情蔓延至第三个州——亚利桑那州，该州加入新墨西哥州和得克萨斯州，共同深受这种恐怖寄生虫的困扰。自6月苍蝇重新入侵该国以来，美国已累计发现74起动物病例。
This week, the country's New World Screwworm (NWS) infestation spread to a third state, Arizona, which joins New Mexico and Texas in being plagued by the horrifying parasites. To date, 74 animal cases have been identified in the US since the flies re-invaded the country in June.
苍蝇会在动物的伤口及潮湿孔道中产下数百枚卵，孵出的贪婪蛆虫随即以宿主为食。蛆虫形似螺丝，会扭曲钻入活体组织，造成严重甚至致命的创伤，随后落地发育成成虫。
The flies lay hundreds of eggs in wounds and moist orifices of animals, and the resulting voracious maggots feast on their victims. The maggots resemble screws and tortuously bore and twist into living flesh, causing severe, sometimes fatal wounds, before dropping to the ground to develop into adults.