Figure 2 The blue 4′,6‐diamidino‐2‐phenylindole (DAPI)‐stained images in the second row of the figure show at low magnification (×100) a deep fissure crossing the tonsil. The indicated regions are shown at higher magnification relative to DAPI image after hybridisation with the Eub338‐Cy3 (orange) probe. Bacteria fill the fissure (F–N) and infiltrate the adjacent parenchyma in fissure branches of secondary order (H,M,N).