Confirmed New World screwworm detections in the US rose to 99 cases for the week ending November 3, 2026, up from 71 a week earlier. The update tracks active and inactive animal cases under mitigation.
Rising screwworm cases threaten cattle movement and herd health, tightening feeder and live cattle supply and supporting prices, while prompting movement restrictions from trading partners.
After 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.