A Maryland resident who traveled to El Salvador came home last month with an unwelcome souvenir: larvae of the New World screwworm burrowing in their flesh. The patient has since recovered from the painful parasite, and Maryland health officials confirmed that there’s no sign of transmission to anyone else. On its own, it’s a medical oddity — a one-off, travel-linked case that doesn’t pose a direct risk to Americans. But it’s also a warning sign of a much bigger threat creeping toward US borders. Meanwhile, the Trump administration pushed out around 15,000 USDA employees and terminated a screwworm monitoring project.