Scientists Confirm 'Screwworm' Infestation Spreads to New U.S. Region, Threatening Livestock and Public Health
RALEIGH, NC – October 26, 2023 – The United States Department of Agriculture, or USDA, has verified the emergence of an invasive screwworm outbreak in a previously unaffected region of the southeastern United States, sparking urgent containment measures. Federal and state officials are mobilizing resources to address what they describe as a highly contagious parasitic threat that primarily targets warm-blooded animals, including livestock and, in rare cases, humans.
Who: The USDA, alongside the North Carolina Department of Agriculture and Consumer Services, is leading the response. Local veterinarians and wildlife experts are also on alert.
What: The New World screwworm, scientifically known as Cochliomyia hominivorax, has been detected in a cluster of feral hog populations. This fly larva burrows into open wounds of living animals, causing severe tissue damage and potentially fatal infestations if untreated. The outbreak is unprecedented in this area, which was previously considered free of the pest.
When: The first confirmed case was reported on October 24, 2023, with subsequent laboratory tests confirming the infestation on October 26.
Where: The epicenter is identified as a 50-mile radius surrounding Robeson County, North Carolina, though authorities warn that the screwworm may have already spread to neighboring counties.
Why: Officials attribute the introduction to the accidental transport of infested animals across state lines, exacerbated by recent warm weather that accelerated the fly’s reproductive cycle. The USDA emphasizes that swift intervention is critical to protect the $8 billion livestock industry.
How: The USDA has initiated a Sterile Insect Technique program, releasing sterilized male flies to disrupt breeding. Quarantine zones are being established, and farmers are instructed to inspect all livestock for skin lesions. Public advisories urge reporting of any wildlife or domestic animals exhibiting unusual wounds.
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