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. 2017 Sep 26;12(9):e0185430. doi: 10.1371/journal.pone.0185430

Fig 4. Principal component analysis (PCA) from MS spectra of idiosomes and legs of I. ricinus infected or not by Borrelia sp.

Fig 4

PCA dimensional image from MS spectra of I. ricinus idiosomes (A) and legs (B) Borrelia-free (red dots, n = 10), infected by B. afzelii (green dots, n = 6), B. burgdorferi (blue dots, n = 3), B. garinii (yellow dots, n = 2), co-infected by B. garinii and B. burgdorferi (purple dots, n = 1). (C) PCA dimensional image from the same MS spectra of I. ricinus idiosomes (red dots, n = 22) and legs (green dots, n = 22). The contributions of PC1, PC2 and PC3 were 38.4%, 15.5% and 7.2%, respectively. Among the Borrelia-free specimens, five were laboratory reared and the other five came from field collection.