Fact Check: Did Central American migrants bring screwworm into the U.S. on their pets or bodies?

Media Bias Fact Check (MBFC) publishes daily vetted fact checks from verified IFCN-approved sources. Each claim is independently reviewed for accuracy and context.


Claimant: Roger Marshall (R)


Claim: Migrants from Central America brought screwworm into the U.S. on their pets or bodies.


Rating: FALSE


Explanation: Experts said there is no data showing migrants spread screwworm in a meaningful way. Human cases are rare, and although illicit livestock movement may have contributed, it does not explain the outbreak’s origin.


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Date: 07/06/2026


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Last Updated on July 6, 2026 by Media Bias Fact Check