SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Chlamydia. Coloured scanning electron micrograph (SEM) of chlamydia (Chlamydia sp.) bacteria (green, spherical, centre) in a ruptured cell. Chlamydia is the most common bacterial sexually transmitted disease in humans. Chlamydia are obligate intercellular bacteria. After infection, the bacteria replicate in a large vesicle inside the cell. Here the vesicle has been broken open revealing the bacteria.
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