Epithelial surface of tonsils

A) Healthy tonsillar epithelium free of bacteria. B) Superficial adherence of bacteria to the tonsillar surface. Bacteria are attached to the surface and mixed with an inflammatory infiltrate. Insertion b) DAPI stain of the same microscopic field reveals the DNA structures. Bacteria are enveloped by a lymphatic infiltrate (large blue nuclei of leukocytes). C) Fissure filled with bacteria. D) Microabscess. Bacteria are hybridized with universal Eub338 Cy3 probe, x400 orange fluorescence. (Magnification x400).