Fig. 1

Line chart of the Klebsiella variicola ST6385 outbreak in the neonatal intensive care unit (NICU). The x-axis represents days, with day 0 being the day the hospital infection prevention and control (IPC) team was alerted by the NICU of four cases of Klebsiella spp. associated bacteremia over the preceding month (actual dates are omitted for patient privacy). Each horizontal shaded bar represents the days spent by the numbered infant in the room as indicated on the y-axis. Infants with non-ST6385 K. variicola (lighter-shaded grey bars), or Klebsiella pneumoniae (darker-shaded grey bars) are labelled with letters instead of numbers. Infant A was born on day − 76 and infant B was born on day − 63