Peter Fischer Field research technicians (from left) Aaron Mamolu and Emanuel Gray, along with Lincoln Gankpala (right), a senior research technician and DOLF project coordinator of the National Public Health Institute of Liberia, examine blood smears for worm larvae in a remote village of Foya District, Liberia, in 2016. Researchers at Washington University School of Medicine in St. Louis have received a grant to develop better diagnostic tests for worm infections as part of an international effort in Liberia and elsewhere to eliminate two tropical infectious diseases: lymphatic filariasis and onchocerciasis. Global campaigns to eliminate two tropical parasitic worm infections have been hindered by lack of good diagnostic tools. Since the turn of the century, multinational mass drug-treatment efforts have cut the number of people at risk of lymphatic filariasis and onchocerciasis by more than half, but more than half a billion people remain at risk. The next phases of these global disease elimination programs will require better tests for detecting people who are infected and infectious for others.