Saturday, June 06, 2026

Screwing Around

Why?
The spread of New World screwworms across Central America has been very rapid, seemingly traveling hundreds of miles within weeks.

Animal experts believe the movement is too quick to be done by the fly itself, meaning people were clearly shipping infested livestock around Central America.

Screwworms usually don’t stray too far from their natural tropical and subtropical climates on their own. The parasitic flies do not tolerate prolonged periods of very dry, hot, or very cold weather. Rapid spread in a country is mainly due to humans moving infested animals over large distances.
No one could have foreseen.

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