A USDA-APHIS extension article recaps the 2016 confirmation of New World screwworm in a Florida Key deer, after which eradication was completed. It warns that rapid identification protocols and awareness need to improve to prevent a similar outbreak.
Screwworm is a serious livestock pest, and any renewed US outbreak could trigger movement restrictions and cattle market disruption. The article points to preparedness rather than a current supply shock, so the price effect is limited.
After 69 past neutral disease events, LCATTLE moved a median -0.1% over 5 sessions (42% higher; middle half -0.8% to +0.6%), and +0.9% 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.