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Neisseria gonorrhoea cells Neisseria colonies Oxidase-positive reaction of Neisseria
Neisseria is a Gram-negative diplococcus responsible for such serious diseases as gonorrhea and meningitis. Neisserias are obligate aerobes, oxidase-positive, and fastidious. Many can survive inside of host white blood cells, and infections are often identified by finding Gram-negative diplococci in a stain.
Class β -Proteobacteria
Bergey's Manual Volume 2: The Proteobacteria