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Home > All Images > 1993 > November > 26 Nov 1993

Images Dated 26th November 1993

Choose from 5 pictures in our Images Dated 26th November 1993 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Streptococcus mutans bacteria on tooth Featured 26 Nov 1993 Image

Streptococcus mutans bacteria on tooth

Streptococcus mutans bacteria. Coloured scanning electron micrograph (SEM) of Streptococcus mutans bacteria adhering to the enamel of a tooth. At top is a typical chain of these Gram-positive, non- motile, spherical bacteria. Lower down (white) is dental enamel. Streptococcus mutans is a major cause of tooth decay and one of the principal bacteria that cause plaque formation on teeth. It produces dextran, the adhesive glucose which makes up plaque. Within plaque, bacteria produce large amounts of lactic acid, causing demineralization of the tooth enamel and dentine, resulting in caries (tooth decay). Magnification: x20, 000 at 6x7cm, x11, 000 at 35mm size. x63, 000 at 8x10ins

© DR KARI LOUNATMAA/SCIENCE PHOTO LIBRARY