Figure 2
From: Outbreak with clonally related isolates of Corynebacterium ulcerans in a group of water rats
Cluster analysis of respective spectra obtained by Fourier-transform infrared-spectroscopy (FT-IR) using OPUS Software (vers. 4.2, BrukerOptics). In each case two IR-spectra of isolates from water rats and a selection of several C. ulcerans and C. diphtheriae strains were used for calculation with Ward’s algorithm. The dendrogram obtained depicts the arrangement of isolates in groups according to their spectral differences.