New Mexico Department of Agriculture

The New World screwworm, previously eradicated from the U.S. in the 1960s, is spreading in Mexico and Central America, prompting federal and state officials to prepare for a potential invasion. A cattle import ban from Mexico and measures like sterilizing millions of flies aim to prevent infestations, which could further disrupt already strained livestock markets and drive up meat prices.

The New World screwworm, previously eradicated from the U.S. in the 1960s, is spreading from Mexico and Central America, prompting federal and state measures to prevent infestation in livestock. A ban on Mexican cattle imports has worsened beef shortages and driven prices to record highs, with experts warning of ongoing challenges in re-eradicating the parasite.

The New World screwworm, a flesh-eating parasite previously eradicated from the U.S., is spreading in Mexico and Central America, prompting federal and state measures to prevent its entry. A cattle import ban from Mexico and a $750 million sterile fly facility are part of efforts to mitigate risks to livestock and beef markets, which are already strained by high prices and reduced herd sizes.

Federal and state officials are preparing for a potential New World screwworm invasion near the U.S.-Mexico border, which could disrupt livestock markets and raise beef prices. A ban on Mexican cattle imports and sterilization efforts are underway, but experts warn eradication may be challenging. Beef prices have already surged 77% since January 2020 due to supply shortages and high demand.