**New World screwworm (Cochliomyia hominivorax) larvae infest open wounds in warm-blooded animals, causing myiasis that can rapidly kill livestock if untreated.** The U.S. eradicated the pest domestically in the 1960s using sterile insect technique releases, but an outbreak began with the first confirmed U.S. case on June 3, 2026, in a calf in Zavala County, Texas. Subsequent detections through mid-August 2026 have involved dozens of cases (primarily cattle, plus goats and sheep) across multiple Texas counties, with one early detection in a dog in Lea County, New Mexico. USDA-APHIS leads intensified surveillance, including traps, drone flights, and movement controls, while maintaining infested zones mainly in Texas and adjacent New Mexico areas. No confirmed livestock (cattle, goats, sheep) cases outside Texas have been reported as of mid-August 2026, though the New Mexico dog case and proximity to the border raise spread risks via animal transport or wild hosts. Official updates note very low current risk to U.S. animals and people overall, with no locally acquired human cases. Trader sentiment centers on containment effectiveness: ongoing detections within Texas versus any new livestock confirmation in another state. Key upcoming factors include USDA port reopening decisions (e.g., Douglas, AZ on August 24, 2026), weekly APHIS dashboard updates on active cases and fly detections, and any expansion of sterile insect releases or quarantines. Resolution hinges on verified livestock cases by the market's deadline, with model consensus and surveillance data releases serving as primary catalysts.