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New world screwworm has been confirmed in Arizona, joining Texas and New Mexico, with the national case count at 74 and 21 still active. USDA released roughly a million sterile flies over Cochise County, and a sterile fly dispersal facility is planned for Douglas County.
Texas A&M also received about $4 million for a genetic study of the outbreak.
Spread into new cattle-producing states raises the risk of movement restrictions and herd losses, which tightens cattle supply and supports prices. Continued restrictions on Mexican imports also keep US supplies tight.
farmprogress.comNov 2, 2026After 148 past bullish disease events, Live Cattle moved a median +0.4% over 5 sessions (62% higher; middle half -0.5% to +1.2%), and +1.4% over 20.
After 122 past bullish disease events, Feeder Cattle moved a median +0.4% over 5 sessions (60% higher; middle half -1.0% to +1.6%), and +2.0% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.
