Pennsylvania Requires Wildlife Screwworm Checks

Pennsylvania has published an order requiring veterinary checks for New World screwworm in imported wildlife. The Game Commission directive appeared in the October 17 Pennsylvania Bulletin, following its signing and immediate effective date on October 2.

Imported wildlife must be examined by a USDA-accredited veterinarian and determined free of the pest. An accompanying veterinary inspection certificate must be issued within seven days before entry and confirm individual inspections finding no obvious wounds or evidence of infestation.

The directive establishes inspection and documentation requirements, not a blanket import ban. Its terms remain effective until modified or rescinded.

New World screwworm is a parasitic fly whose larvae feed on living animal tissue. USDA warns that infestations can cause severe, sometimes fatal damage. The threat extends beyond farm animals: pets and wildlife are susceptible, and people can occasionally be affected.

Wildlife movement is an important part of prevention. USDA explains that wild animals can carry the pest across wide areas and state boundaries, making surveillance essential for protecting both wildlife populations and other animals. Screening transported animals addresses one potential route of introduction.

Federal guidance identifies warning signs including irritated behavior, head shaking, an unusual smell of decay and fly larvae in wounds. Those observations require professional assessment; they are not a basis for an untrained observer to confirm the species of parasite.

USDA asks people to report suspected wildlife infestations promptly. Outside Texas, its wildlife guidance directs reports to USDA Wildlife Services at 866-487-3297 or the appropriate local office. Owners concerned about a domestic animal should contact their veterinarian for evaluation.

Why This Matters for Animals

This is a concrete preventive requirement aimed at reducing the risk of moving a dangerous parasite with wildlife. Veterinary examination connects the protection directly to individual animals rather than relying only on paperwork.

Its success cannot be assumed from publication alone. Inspection quality, compliance and timely reporting will matter. The order should be understood as one protective measure—not proof that every infestation will be detected or that wildlife faces no remaining risk.

Source: Pennsylvania Bulletin: New World Screwworm Wildlife Importation Order No. 1