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Streptococcus mutans, SEM
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Streptococcus mutans, SEM
Streptococcus mutans. Coloured scanning electron micrograph (SEM). S. mutans is a coccoid shaped, Gram-positive, anaerobic bacteria that is part of the normal bacteria flora of the mouth. It metabolizes sucrose to lactic acid and is a leading cause of tooth enamel decay. The acidic environment created in the mouth by this process is what causes the highly mineralized tooth enamel to decay. S. mutans is one of a few specialized organisms equipped with receptors for adhesion to the surface of teeth. Sucrose is utilized by S. mutans to produce a sticky, extracellular, dextran-based polysaccharide (glucan) that allows them to adhere to each other forming plaque. Other sugars (glucose, fructose, lactose) can be digested by S. mutans to produce lactic acid. It is the combination of plaque and acid that leads to dental decay. Magnification: x8000 when printed at 10cm wide
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STEVE GSCHMEISSNER/SCIENCE PHOTO
Media ID 19527353
© Science Photo Library
Bacterium Biology Diplococcus Electron Micrograph
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This print showcases Streptococcus mutans, a Gram-positive, coccoid shaped bacteria that resides in the oral cavity as part of the normal bacterial flora. With its ability to metabolize sucrose into lactic acid, this anaerobic bacterium is notorious for being a primary culprit behind tooth enamel decay. The acidic environment created by S. mutans' metabolic process erodes the highly mineralized tooth enamel, leading to dental problems. What sets S. mutans apart from other organisms is its specialized receptors that allow it to adhere firmly to teeth surfaces, forming plaque. By utilizing sucrose, these bacteria produce an extracellular polysaccharide called glucan which acts as a sticky substance binding them together within the plaque structure. While glucose, fructose, and lactose can also be digested by S. mutans to generate lactic acid, it is the combination of plaque and acid that ultimately results in dental decay. Captured at an impressive magnification of x8000 when printed at 10cm wide by renowned photographer Steve Gschmeissner using scanning electron microscopy (SEM), this colored micrograph provides a unique glimpse into the intricate world of Streptococcus mutans biology. Its striking details highlight both the fascinating beauty and potential harm caused by this tiny bacterium lurking within our mouths – reminding us of the importance of maintaining good oral hygiene practices for healthy teeth and gums.
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