DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Coloured scanning electron micrograph (SEM) of Neisseria meningitidis, Gram-negative, coccus prokaryote (dividing). Note the single encapsulated cells; causes meningitis and Waterhouse-Friderichson syndrome (a fulminating meningococcal infection occurring mainly in children under ten years of age). Magnification: x2,600 when shortest axis printed at 25 millimetres.
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