What to know about the New World screwworm fly and its reappearance in the US

The New World screwworm fly is threatening the $113 billion U.S. cattle industry for the first time in more than a half century, with an infestation from its flesh-eating larvae confirmed in south Texas. The infestation was discovered in a single 3-week-old calf in La Pryor, Texas, about 100 miles...

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