MICROSCAPE / SCIENCE PHOTO LIBRARY MICROSCAPE / SCIENCE PHOTO LIBRARY
Fluorescence light microscopy of human oral cavity epithelial cells (green) with thousands of adherent rod-shaped bacteria (orange). Bacteria are normally found in abundance in the mouth and cling to teeth, gums, and soft tissue. Note orange fluorescence of both bacteria and the cell nuclei due to concentration of nucleic acids. Streptococcus is but one of dozens and possibly hundreds of different microorganisms resident in the oral cavity. Magnification x250 when printed at 10cm.
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