Screwworm spreads through wildlife as experts warn eradication efforts fall short

Wildlife populations including jaguars, pumas, tapirs, and deer are rapidly infected with parasitic screwworm wounds; potential for broader disease transmission to livestock and human populations.

A parasite once banished from North America has returned, and its northward march reveals something older and harder to fix than the fly itself: the invisible highways of illegal cattle movement that carry disease faster than any wing can fly. Screwworm, absent from the United States for thirty-five years, has now been detected in thirty-four animals across Texas and New Mexico, while deep in Central American forests, jaguars and tapirs bear its wounds in silence. The eradication tools that worked in 1966 are being deployed again, but the world they must work in has grown far more tangled — an

Screwworm spreads through wildlife as experts warn eradication efforts fall short

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