Figure 6

Principal component analysis of spectra derived from B. mallei and B. pseudomallei.Principle Component Analysis of ten strains of B. mallei and ten strains of B. pseudomallei, respectively. The unsupervised statistical analysis separates both species based on the three major principle components. While B. mallei form a relatively uniform cluster, significant diversity can be observed for B. pseudomallei. Analysis of the spectra from the specimens in Table 1 yielded very similar results (data not shown).