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Biofilm of Helicobacter pylori. A: Scanning electron micrograph of mature biofilm on a polystyrene surface with rod shaped and coccoid cells embedded in an abundant matrix. Insert: Confocal laser scanning microscopy image of mature in vitro biofilm with viable (green) and dead (red) cells, live/dead staining; B: Clusters of coccoid Helicobacter pylori cells in the gastric mucosa also embedded in a matrix (insert). Bars represent 5 μm.
