Controversies in Hospital Infection Prevention: Heads, MRSA. Tails, possibly MRSA..
Cepheid just issued a recall notice on the Xpert MRSA/SA BC test, the rapid, real-time assay that is designed to quickly identify MRSA vs. MSSA in positive blood cultures. Seems MRSA can evolve (!), and there are now some isolates that are not detected, resulting in false-negative results (that's what us clin micro types call a "very major error").
