In 1966, the United States declared victory over a destructive flesh-eating parasite that devastated livestock. The New World Screwworm is a fly whose larvae burrow into the living flesh of mammals. It was eradicated after a long campaign that involved releasing millions of sterile flies over infested areas.

Last week, that fly came back.

The U.S. Department of Agriculture confirmed five cases of larvae contamination in Texas and New Mexico – the first detections in decades. Federal officials say the food supply is safe, but the cattle industry is on high alert. The American cattle supply is already at a 75-year low. Beef prices are high. And a screwworm outbreak could make it worse.

Outside farms and ranches, the tick population is growing and spreading in new parts of the country. Emergency room visits for tick bites hit a 10-year seasonal high in April. And a growing number of Americans are discovering they’ve developed an allergy to red meat triggered by tick bites.

We sit down with a panel of experts to talk about it.

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