The New World screwworm, a flesh-eating parasite known for infesting warm-blooded animals, is once again raising concern among U.S. agriculture and livestock communities. This dangerous pest preys on a wide range of hosts including cattle, horses, sheep, goats, birds, wildlife, and even household pets.

Though once widespread in the southern United States, the screwworm was successfully eradicated in the 1960s through intensive efforts led by the U.S. Department of Agriculture (USDA). However, recent outbreaks in Mexico have reignited fears of the pest's potential return.

In response to the growing threat, the USDA has temporarily suspended livestock imports from Mexico. The screwworm has been detected on farms approximately 700 miles south of the U.S. border, prompting heightened monitoring and containment efforts. While the parasite has not yet reached American soil, its advancing proximity is a serious cause for concern.

To help livestock owners stay informed and prepared, the Arizona Farm Bureau has launched a dedicated online New World Screwworm Resources page. The page provides guidance on identifying signs of screwworm infestation, protecting animals from potential exposure, and reporting any suspected cases to the relevant authorities.

The site also includes links to additional resources from the USDA and the Texas Animal Health Commission, as well as a comprehensive educational webinar produced by Texas A&M University. Click here to access the Texas A&M webinar.

With vigilance and collaboration, officials hope to prevent the re-establishment of this devastating pest in the United States. Livestock owners are encouraged to remain alert and utilize available resources to safeguard their animals.