R-CALF USA is calling on the FDA to approve ivermectin to help protect livestock from the possible spread of New World screwworm in the U.S.
The group says that feed-grade ivermectin is a proven tool to protect domestic herds and wildlife, especially in southern border states.
They highlight the success of the drug in limiting the spread of cattle fever tick.
“The potential impact on the United States livestock markets would be immensely negative if an actual case of New World screwworm was identified in the USA. Until an adequate response with gamma ray irradiation of male screw worm flies can be implemented, the feeding of ivermectin is a very real defense.”
The request follows false reports that New World screwworm was found in Missouri. That claim caused a downturn in cattle futures markets and is now being investigated by the state of Missouri.
While treatable with a vaccine, anthrax is a dangerous threat to cattle herd health if not identified and treated immediately.
September 26, 2025 06:10 PM
·
Lower inventories and cautious farrowing plans suggest tighter hog supplies into 2026, keeping producer margins sensitive to demand trends and health risks.
September 26, 2025 11:28 AM
·
Midwest corn and soy producers are monitoring for disease and lower yields due to the ongoing drought over the last 30 days.
September 24, 2025 04:38 PM
·
Fewer placements and historically low marketings point to tighter cattle supplies ahead, with Nebraska and Kansas gaining ground as Texas feedlots face supply pressure and the threat of New World Screwworm.
September 24, 2025 03:40 PM
·
What is it like working cattle with an outbreak of New World Screwworm so close to home? Wayne Cockrell, with the Texas and Southwestern Cattle Raisers Association, joined us on Wednesday to discuss.
September 24, 2025 12:29 PM
·
“We believe that it is just a matter of days or weeks... before we see New World screwworm in Texas.”
September 23, 2025 11:08 AM
Farmers may benefit from higher turkey prices this holiday season, but risks from HPAI and limited poult placements could further strain the supply.
September 23, 2025 10:35 AM
·
September 23, 2025 09:42 AM
·
With the latest detection just across the border, animal health officials on both sides are intensifying efforts to contain the outbreak before it spreads further north.
September 22, 2025 09:51 AM
·
