An ocean molecule stopped one of medicine's deadliest parasites in four hours — in the lab

The ocean may hold a faster answer to one of medicine's rarest and deadliest infections. Scientists at UC San Diego tested rutamycin B — a compound made by a marine bacterium — against Naegleria fowleri, an amoeba that lives in warm fresh water and causes a brain infection very few people survive. In lab dishes, the compound reached full strength in four hours, four times faster than amphotericin B, the drug doctors rely on today, and it was 200 to 300 times harder on the amoeba than on human cells. Mixed with the standard drug, it still worked at just 3% to 10% of its usual dose. This is early work — cells in dishes, not patients — and the next step is finding out whether it can reach the brain in living animals. But for an infection where hours decide everything, that kind of speed is exactly what doctors have been missing.

SDG 3 · Good health and well-being — Mechanism: tech innovation