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The terrifying return of the New World screwworm has been officially confirmed in Texas, reigniting fears of a deadly parasitic invasion that was once considered eradicated in North America. A three-week-old calf in Zavala County tested positive this week, marking a disturbing milestone for livestock health and food security across the region. But this outbreak isn’t occurring in a vacuum—experts warned that the spread of the screwworm, a flesh-eating fly whose larvae tunnel into living tissue, was only a matter of time. Originating in Central America and Mexico, the pest has been steadily migrating northward since at least 2022, with












