DR KARI LOUNATMAA / SCIENCE PHOTO LIBRARY DR KARI LOUNATMAA / SCIENCE PHOTO LIBRARY
Mitsuokella dentalis. Coloured transmission electron micrograph (TEM) of bacteria that cause tooth decay, Mitsuokella dentalis. These cells were isolated from dental root canals. They are gram negative rod-shaped bacteria. The surface of each cell is covered with numerous short & thick protuberances. These are called pili, some of which play a role in bacterial reproduction. Around the cells are dots and trails of a lipo- polysaccaride from the cell walls of the bacteria. These bacteria are anaerobic (do not require oxygen to live) and are related to the genus Bacteroides. Magnification: x7000 at 6x7cm size. Magnification; x24,000 at 8x10 nich size.
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