Fig. 4

Pg detection in healthy and pathological gingiva, in dental plaque and in AAA. Pg bacteria (red Immunofluorescence staining) is not spotted in healthy gingiva (a), nor in the epithelium (EP) where cell nucleus are visible by DAPI in blue (b), nor in the connective tissue (c) (c). Pg clusters are present in pathological gingiva (d) both in the epithelium (e) and in the connective tissue (f). These bacteria are found in AAA, particularly in the rupture area (RA) between media (M) and atheroma (Ath) (h). The elastic fibers are highlighted in green. By RT-PCR, Pg is detected in dental plaque from periodontitis, whereas they are not in dental plaque from clinically healthy gingiva (G1 and G2) (g)