CNRI / SCIENCE PHOTO LIBRARY CNRI / SCIENCE PHOTO LIBRARY
False-colour transmission electron micrograph (TEM) of Neisseria meningitidis, a species of non- motile, non-capsulate, aerobic, Gram-negative bacteria causing meningitis. Individual cocci are typically arranged in pairs, each one concave on the side facing its partner. N. meningitidis is an obligate human parasite & the cause of meningococcal (cerebrospinal) meningitis, the inflammation of the connective tissue membranes lining the brain, which occurs sporadically or in epidemics. In temperate climates most epidemics have occurred in close communities, such as barracks in wartime. Magnification: x20, 000 at 35mm size.
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