THOMAS DEERINCK, NCMIR / SCIENCE PHOTO LIBRARY THOMAS DEERINCK, NCMIR / SCIENCE PHOTO LIBRARY
Tongue bacteria. Coloured transmission electron micrograph (TEM) of bacteria (red) on the surface of a pig's tongue. Large numbers of bacteria can form a visible layer on the surface of the tongue (brown). The mouth contains a large number of bacteria, most of which are harmless or even beneficial. However, some bacteria can cause infections or lead to tooth decay. Magnification: x6250 when printed at 10 centimetres wide.
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