By Blake Jackson
The Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP) has announced a temporary order strengthening animal import requirements to help prevent the spread of New World Screwworm (NWS), a dangerous parasite that threatens livestock, pets, wildlife, and other warm-blooded animals.
The updated rules are designed to reduce the risk of the pest entering Wisconsin from states where infestations have been confirmed.
As of June 2026, active NWS cases have been reported in Texas and New Mexico. The U.S. Department of Agriculture (USDA) is responding through several control measures, including the release of sterile flies, enhanced surveillance efforts, and restrictions on animal movement.
Because Wisconsin regularly receives animals from southern states, officials say preventive action is essential.
Beginning July 21, 2026, animals entering Wisconsin from areas with active NWS infestations must meet additional import requirements. Existing regulations already require most animals crossing state lines to be accompanied by a Certificate of Veterinary Inspection (CVI).
Under the temporary order, animals that did not originate in an infested area must have a CVI confirming they are free from affected zones.
Animals coming directly from an NWS-infested area will only be allowed into Wisconsin if importers obtain a DATCP-approved permit at least 48 hours before transport.
The CVI must also verify the animals' origin, document a veterinary inspection conducted within five days of movement showing no evidence of NWS, and include information on any treatments provided before shipment.
The temporary order will remain in effect until it is officially withdrawn by the Wisconsin State Veterinarian.
DATCP is urging livestock owners, veterinarians, and animal producers to closely monitor animals for unusual wounds or larvae and to maintain strong biosecurity practices.
Suspected cases should be reported immediately to DATCP at (608) 224‑4872 (business hours) or (800) 943‑0003 (after hours and weekends), to support rapid detection and response.
Photo Credit: gettyimages-pamwalker
Categories: Wisconsin, Livestock, Beef Cattle, Dairy Cattle