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Sudden Screwworm Resurgence Finds Catalyst in Ideal Fly Weather

Bloomberg Markets Wednesday 11 November 2026, 15:13 UTC By Ilena Peng and Lauren Rosenthal 1 min read
Key Points

Sudden Screwworm Resurgence Finds Catalyst in Ideal Fly Weather The New World screwworm has made a comeback in the US after months of relatively muted cases, thanks in large part to milder temperatures and humidity that are encouraging the deadly livestock parasite’s activity. More than 40 cases of screwworm have been confirmed so far in November, already making it the worst month since the pest first appeared in Texas earlier this year, according to the US Department of Agriculture. Cases...

Sudden Screwworm Resurgence Finds Catalyst in Ideal Fly Weather The New World screwworm has made a comeback in the US after months of relatively muted cases, thanks in large part to milder temperatures and humidity that are encouraging the deadly livestock parasite’s activity. More than 40 cases of screwworm have been confirmed so far in November, already making it the worst month since the pest first appeared in Texas earlier this year, according to the US Department of Agriculture. Cases began accelerating in October, when the pest spread to Arizona for the first time.
US (LOCATION) Texas (LOCATION) the US Department of Agriculture (ORG) Arizona (LOCATION)
Originally published by Bloomberg Markets Read original →

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