
A USDA-confirmed New World screwworm case in a Florida Key deer in 2016 was eradicated, but the article argues faster identification protocols are needed. Screwworm feeds on living tissue and can devastate livestock, especially young animals.
A screwworm outbreak in a densely populated livestock area would threaten animal health and movement, creating supply risk for cattle markets, but no current outbreak is reported.
After 356 past disease events, Live Cattle moved a median +0.2% over 5 sessions (54% higher; middle half -0.8% to +1.1%), and +1.1% over 20.
After 266 past disease events, Feeder Cattle moved a median +0.5% over 5 sessions (59% higher; middle half -1.1% to +1.7%), and +1.7% 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.