The spray can be used for prevention but not for treatment of wounds affected by the New World screwworm.

The U.S. Food and Drug Administration has authorized emergency use of a new wound spray to help ranchers protect livestock from New World screwworm. Texas Public Radio’s Yvette Benavides reports on CLiK Extra. Texas Agriculture Commissioner Sid Miller thanked the FDA for the approval, but expressed frustration over the U.S. Department of Agriculture's continued reliance on sterile flies.