Deworming drug could stop blinding flies

This study tests whether a safe dose of ivermectin, a common deworming drug, can make human feces deadly to flies that spread trachoma. Trachoma is a leading cause of blindness, and these flies carry the bacteria from person to person. Twelve healthy adults will take ivermectin, and researchers will collect their stool and tears for up to 30 days to see if the drug kills fly larvae and how much ivermectin is excreted.