The New World screwworm isn’t a pest most Midwestern cattle producers have ever needed to think about. But veterinarians say it’s worth keeping an eye on.
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Angela Varnum
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Beware New World screwworm spread
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After about seven days of feeding on an infested animal’s wound, New World screwworm larvae drop to the ground, burrow into the soil and pupate.
Screwworm infestations begin when a female fly lays eggs on a wound or orifice of a live warm-blooded animal. Female flies are attracted to the odor of a wound or opening – such as nasal or eye openings, umbilicus of a newborn or genitalia.
A goat is treated for a New World screwworm infestation.
