U.S. Health Secretary Rollins said authorities saw the screwworm parasite threat coming and are preparing containment measures as it spreads north toward the Mexico border.
Screwworms lay eggs in open wounds of livestock and wildlife, causing debilitating infestations once endemic in parts of North America.
Veterinary services expanded trapping and inspection along southern ranchlands to detect early crossings.
Mexico cooperates on surveillance flights and sterile fly releases that historically eradicated the pest decades ago.
Ranchers were advised to report unusual animal wounds promptly to prevent regional reestablishment.
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Sources:
https://www.usnews.com/news/health-news