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TEM micrograph of Streptococcus mutans; (a) Normal cells: 1. Cell wall, 2. Homogenous cytoplasm, 3. Cell membrane; (b) cell affected with Stenotrophomonas maltophilia: 4. Cell rupture, 5. Damage of cell wall and membrane, 6. Leakage of cytoplasm; (c) cell affected with Serratia marcesens (15): 7. Empty cell.
