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New World screwworm has nearly 2,000 active cases in Mexico, about 200 of them near the Texas border, though there are no U.S. cases. Rio Grande Valley county judges and Texas officials held a press conference warning that the parasite will likely reach the U.S. and urging pet and livestock owners to treat wounds.
USDA has begun building a sterile fly production facility at Moore Air Base near Edinburg.
A likely U.S. screwworm outbreak would raise the risk of movement restrictions and herd losses, tightening cattle supply and supporting feeder and live cattle prices.
krgv.comSantiago CaicedoNov 1, 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.
