Raman spectroscopy-based cluster analysis of Acinetobacter baumannii-calcoaceticus complex isolates from adult and ER-ICUs. Note: Raman spectra correlation matrix of carbapenem-nonsusceptible A. baumannii-calcoaceticus complex isolates. Isolates are shown in a color-scale (red-orange-yellow-grey) based on their similarity of correlation coefficient value. Red clusters (91–100%) indicate isolates that are indistinguishable according to the cut-off value. Grey areas (≤70%) indicate isolates that are not related. The potentially related isolates are shown by yellow areas (lower similarities (71–80%)) and orange areas (higher similarities (81–90%)). (JPEG 761 kb)