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False-colour scanning electron micrograph (SEM) of the Gram-negative bacteria Neisseria meningitis (meningococcus), which causes cerebrospinal fever (spotted fever) & bacterial meningitis in humans. A spherical bacteria, or coccus, it is commonly found growing in pairs or clumps. The bacteria is transmitted from person to person in droplets of mucus from a patient or carrier. Magnification: x20,580 at 35mm size.
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