New World screwworm found in Arizona for the first time
New World screwworm, a deadly parasite, was found in Arizona for the first time, detected in a dog. Cases of the parasite are accelerating, and this detection shows it is reaching new areas. The find adds to concern about animals and people in the region.
ContextContext: Screwworms are fly larvae that feed on living flesh, and the US once wiped out the pest in the 1960s. Its spread north through Mexico has made it a growing worry for American livestock and pet owners.
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