health
America Desperately Needs More Sterile Screwworms
Ranchers are waiting for hundreds of millions of sterile flies to be produced, or for a technological breakthrough.
TL;DR
- Screwworms, eradicated from the U.S. decades ago, have reappeared in Texas.
- The current U.S. Department of Agriculture program requires the release of sterile male screwworm flies for eradication.
- The program faces a severe shortage of sterile flies, with current production levels far below the estimated 500 million needed.
- Construction of new, larger sterile fly production facilities in Mexico and Texas has been delayed.
- Ranchers are using older methods to manage the outbreak, such as inspecting livestock and treating wounds.
- The screwworms pose a threat to cattle, pets, wildlife, and potentially humans.
- Research is underway to find technological solutions, including new irradiation techniques, detection dogs, novel insecticides, and genetically modified male-only screwworm strains.
- Wildlife, particularly deer, may act as reservoirs for the screwworm population.
- Experts estimate the re-eradication effort could take three to five years.