If you can say it in one plain sentence, you have the week’s idea:

When a blood culture turns positive, watching how bacteria respond to antibiotics under a microscope can tell which drug will work in about two hours.

In 2026, U.S. regulators cleared a Class II lab pathway for automated phenotypic susceptibility testing from positive blood cultures using video microscopy of single-cell responses — clearance news about a capability class, not a brand answer. Public announce of that clearance landed in September 2026. Clearance is not the same as every hospital already running the path.

Company-reported assay windows after cartridge load land around about two hours for covered Gram-negative groups (longer for some organism classes). Round to the stranger-clear phrase; keep exact tables in lab notes, not as invent targets.