Fig. 3
Principal component analysis of variables with potential influence on MAP transmission and positivity to MAP3865c133–141/MAP3865c125–133 peptides. Bi-plots show correlation between the analyzed epitopes and variables relative to personal dietary history, geographical provenience and gender in CD patients (a), UC subjects (b) and nIBD used for both analyses. Samples positive to anti-MAP Abs are represented by squares whereas those negative by circles; all variables are described by labels and their position is indicated by triangles. The distribution illustrates only PC1 and PC2 correlations