The New World screwworm has been found in Texas and New Mexico. This indicates that previous efforts to keep the parasite out have failed, creating a potential threat to both livestock and human health.

在新墨西哥州和德克薩斯州發現了新世界螺旋蠅。這表明先前防止寄生蟲進入的努力已失敗，對牲畜和人類健康構成了潛在威脅。

Currently, there are five confirmed cases in the U.S.: four calves in Texas and one dog in New Mexico. The USDA stated that the New Mexico case might be isolated, although they are still investigating the animal's travel history to Mexico. This return happened because the parasite moved north from the Darién Gap around 2022, affecting Panama, Costa Rica, Nicaragua, and Mexico. Experts emphasize that a full-scale return could cause huge financial losses, potentially costing Texas producers $732 million and the wider state economy $1.8 billion annually.

目前美國有五起確認病例：德克薩斯州四隻小牛和新墨西哥州一隻狗。美國農業部（USDA）表示，新墨西哥州的病例可能是單一事件，儘管他們仍在調查該動物前往墨西哥的旅行史。這次回歸是因為寄生蟲在2022年左右從達連地峽向北遷移，影響了巴拿馬、哥斯大黎加、尼加拉瓜和墨西哥。專家強調，如果全面回歸可能會造成巨大的財務損失，德州生產者每年可能損失 7.32 億美元，而整個州的經濟每年可能損失 18 億美元。

Biologically, the screwworm is a fly whose larvae eat living tissue instead of dead matter. The female fly lays eggs in open wounds, and the larvae then burrow into the host, which can lead to severe infections or death. While livestock are the main economic concern, there is also a risk to humans. The CDC reported 2,100 human cases by June 8, with deaths occurring mostly in people with weak immune systems. Infestations in the scalp are particularly dangerous, as they can penetrate the skull and have an 8% mortality rate.

從生物學上講，螺旋蠅是一種幼蟲食用活組織而非死組織的蠅類。雌蠅在開放性傷口中產卵，幼蟲隨後鑽入宿主體內，可能導致嚴重感染或死亡。雖然牲畜是主要的經濟考量，但人類也面臨風險。美國疾病管制與預防中心（CDC）報告到截至6月8日共有 2,100 起人類病例，死亡病例主要發生在免疫系統較弱的人群中。頭皮感染尤為危險，因為它們可以穿透頭骨，致死率達 8%。

To fight this, authorities are using the 'Sterile Fly Technique,' which involves releasing sterile male flies to stop the population from growing. The USDA is currently releasing eight million sterile flies and pupae every week in South Texas. Furthermore, new facilities are being built in Mexico and Texas to increase production. Meanwhile, Canada has placed temporary restrictions on livestock imports from affected U.S. areas to protect its markets, although experts believe the cold Canadian climate will prevent the parasite from settling there permanently.

為了對抗這一問題，當局正採用「不育蠅技術」，即釋放不育的雄蠅以阻止族群增長。美國農業部目前在南德州每週釋放 800 萬隻不育蠅和蛹。此外，墨西哥和德州正在建設新設施以增加產量。與此同時，加拿大對來自美國受影響地區的牲畜進口實施臨時限制以保護其市場，儘管專家認為加拿大寒冷的氣候將防止寄生蟲在當地永久定居。

The New World screwworm has returned to the U.S. through Texas and New Mexico, leading to the mass release of sterile insects and increased veterinary monitoring.

新世界螺旋蠅經由德克薩斯州和新墨西哥州重返美國，導致大規模釋放不育昆蟲並增加獸醫監測。