来自中美洲的食肉寄生虫威胁美国牛群,抬高牛肉价格。 A flesh-eating parasite from Central America threatens U.S. cattle, driving up beef prices.

新世界螺旋虫是一种威胁牛的食肉寄生虫，它正在从中美洲向北向美国移动，促使美国停止进口墨西哥牛。 The New World Screwworm, a flesh-eating parasite threatening cattle, is moving north from Central America towards the U.S., prompting a halt on U.S. imports of Mexican cattle. 由于美国牛群数量少,这可能进一步抬高本已很高的牛肉价格。 This could further drive up already high beef prices due to a low U.S. cattle herd. 美国农业部计划投资2 100万美元在墨西哥生产不育螺丝虫,目的是在年底前重新开放边境,供牲畜进口。 The U.S. Department of Agriculture plans to invest $21 million to produce sterile screwworms in Mexico, aiming to reopen the border for cattle imports by year-end.