Screwworm flies were a scourge on cattle, deer, sheep and other animals for decades. The flies lay eggs in open wounds, which hatch into larvae who feed on the animals' flesh. Without treatment ...

The parasite, identified as Thelazia gulosa, is normally spread between cattle by flies landing on or near the eyes. This particular eye worm species has never been documented in humans ...

Mexico made a first shipment of sterile parasitic flies to Uruguay to help combat the cattle “screw worm” or Cochliomyia hominivorax, an insect whose larvae or maggots eat living tissue ...

However, cattle outdoors are vulnerable to blood-feeding insects, including gadflies and cattle flies. Growing stress from the pain and itchiness caused by the biting bugs can decrease the animals ...

Why a parasitic fly in Mexico is a threat to Texas livestock Screwworm flies were a scourge on cattle, deer, sheep and other animals for decades. The flies lay eggs in open wounds, which hatch ...