Agriculture Secretary Brooke Rollins addressed concerns about New World screwworms during Senate discussions this week, following the parasite's return to the United States for the first time in 60 years.

Senate Judiciary Chair Chuck Grassley (R-Iowa) urged Rollins to develop a vaccine for the parasitic pest during Wednesday's proceedings. Grassley indicated he had previously spoken with Rollins about vaccine development months before the recent outbreak occurred in Texas.

The screwworm infestation marks a significant agricultural concern, as the parasite had been successfully eradicated from the U.S. mainland six decades ago through intensive control programs. The parasites are known to infest livestock and wildlife, causing significant economic and animal welfare impacts.

Rollins' current characterization of screwworms as a manageable pest contrasts with her previous statements about the threat. According to reports, she had previously described the parasite as a more serious concern before taking her current position.

The Department of Agriculture has not yet announced specific plans for vaccine development in response to Grassley's request. The agency continues to monitor the situation and coordinate response efforts to contain the outbreak.

The screwworm's return has prompted discussions about long-term prevention strategies and the need for updated control measures to prevent future infestations across U.S. agricultural regions.