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Aug 03, 2026

CDC Activates Emergency Operation Center Over Screwworm Outbreak


The Centers for Disease Control and Prevention has activated a Level 3 emergency response for the New World screwworm following recent detections of the destructive parasite in livestock and other animals in southern Texas and a county in New Mexico.

A Level 3 response is the lowest tier in the CDC’s emergency response framework, the agency said in a statement.

Federal health officials are working alongside the U.S. Department of Agriculture and state authorities to contain the outbreak.

The declaration is an example of the Trump administration’s whole-of-government approach, Agriculture Secretary Brooke Rollins said Thursday.

“The CDC is just one more step in the right direction that allows us to deploy more resources at the federal level,” Rollins told reporters in Texas.

The USDA is tracking confirmed animal infestations through a public dashboard as officials monitor the spread of the pest.

New World screwworm primarily threatens livestock, pets, and wildlife. The parasite develops when screwworm flies lay eggs in open wounds or body openings, allowing larvae to feed on living tissue.

President Donald Trump speaks during a Cabinet meeting at Camp David, the presidential retreat, with Secretary of State Marco Rubio on July 31, 2026...

While human infections are possible, no cases have been reported in the United States, and federal officials continue to assess the risk to the public as low.

Health officials emphasized that New World screwworm is not contagious and cannot spread directly between animals, from animals to humans, or from person to person.

Instead, infections occur only through exposure to screwworm flies in affected areas, noted the CDC.

The Trump administration has been preparing for the threat for more than a year. In 2025, the USDA launched an aggressive strategy to prevent the parasite from reestablishing itself in the United States, said the agency.

The effort is being coordinated through an interagency working group led by the USDA, CDC, and Department of the Interior as part of a broader One Health initiative that recognizes the connection between human, animal, and environmental health.

Officials noted that the United States successfully eradicated New World screwworm decades ago and expressed confidence that the parasite can be eliminated again through coordinated surveillance and response efforts.

The CDC is urging healthcare providers in affected areas to remain alert for possible human cases and report any suspected infestations to state or local health authorities.

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