Combining two agents to block a parasitic worm's life cycle boosted survival from a potentially deadly tropical disease to 85% in animal models, far better than either treatment alone. The Strongyloides infestation—brought by tiny worms known as nematodes that can enter through your feet—can cause strongyloidiasis, a chronic infection found in some 600 million worldwide. While mostly found in tropical and subtropical regions, the parasite has recently been identified in Texas, Alabama, and the Appalachian Mountains region in the eastern and northeastern U.S. and caused reported deaths in 36 of 50 states over the years. Mortality from complications with hyperinfection...