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Meningitis bacteria (Neisseria meningitidis), light micrograph. Meningitis is the inflammation of the brain membranes. It can be caused by several bacteria. Typical meningitis symptoms are a severe headache and stiff neck, followed by delirium and coma. Without antibiotic treatment it is often fatal. Gram stain. Magnification: x500 at 35mm size.
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