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How the US was left exposed to the flesh-eating screwworm, years into the outbreak

MEXICO CITY/WASHINGTON, Nov 9 - For decades, planes dropped billions of factory-bred sterile flies to keep the flesh-eating New World screwworm out of North America’s cattle. That controls the pest because sterile…

1 report1 sourceNov 9, 2026, 11:03 AM
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The Straits TimesNov 9, 2026, 11:03 AM

How the US was left exposed to the flesh-eating screwworm, years into the outbreak

MEXICO CITY/WASHINGTON, Nov 9 - For decades, planes dropped billions of factory-bred sterile flies to keep the flesh-eating New World screwworm out of North America’s cattle. That controls the pest because sterile males mate with wild females – whose eggs then fail to hatch.

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