meningococcus

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Related to Neisseria meningitidis: Neisseria gonorrhoeae

Meningococcus

A major human pathogen belonging to the bacterial genus Neisseria, and the cause of meningococcal meningitis and meningococcemia. The official designation is N. meningitidis. The meningococcus is a gram-negative, aerobic, nonmotile diplococcus. It is fastidious in its growth requirements and is very susceptible to adverse physical and chemical conditions.

Humans are the only known natural host of the meningococcus. Transmission occurs by droplets directly from person to person. Fomites and aerosols are probably unimportant in the spread of the organism. The most frequent form of host-parasite relationship is asymptomatic carriage in the nasopharynx.

The most common clinical syndrome caused by the meningococcus is meningitis, which is characterized by fever, headache, nausea, vomiting, and neck stiffness and has a fatality rate of 15% (higher in infants and adults over 60). Disturbance of the state of consciousness quickly occurs, leading to stupor and coma. Many cases also have a typical skin rash consisting of petechiae or purpura. See Meningitis

McGraw-Hill Concise Encyclopedia of Bioscience. © 2002 by The McGraw-Hill Companies, Inc.

meningococcus

[mə¦niŋ·gə¦käk·əs]
(microbiology)
Common name for Neisseria meningitidis.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Neisseria meningitidis bacteria are a leading cause of bacterial meningitis and other serious invasive bacterial infections.
Clonal complexes and sequence types identified in main serogroups of Neisseria meningitidis isolated in Chile, 2012 * No.
Meningococcal carriage in relation to an outbreak of invasive disease due to Neisseria meningitidis serogroup C in the Netherlands.
Increase in Neisseria meningitidis serogroup W135, Niger, 2010.
Large cluster of Neisseria meningitidis urethritis in Columbus, Ohio, 2015.
A search was carried out using the following search string: "((((Primary meningococcal arthritis) OR Monarfhritis Neisseria meningitidis) OR Primary Neisseria arthritis) or Neisseria monoarthritis meningitidis) or Isolated meningococcal arthritis." We found a total of 79 items (Fig.
The incidence of meningococcal disease has been declining in the United States for decades, but Neisseria meningitidis serogroup W incidence has been increasing in countries around the world.
Neisseria meningitidis: Biology, Microbiology, and Epidemiology.
Kuhdari, "Epidemiology of Neisseria meningitidis infections: case distribution by age and relevance of carriage," Journal of Preventive Medicine and Hygiene, vol.
Gram-negative diplococcic, later reported as Neisseria meningitidis, was isolated from blood and cerebrospinal fluid cultures.
Around 10% of adults carry Neisseria meningitidis - the cause of meningococcal meningitis - in the back of their nose and throat with no signs or symptoms.
While meningitis and gonorrhoea are very different diseases, in terms of symptoms and mode of transmission, the bacteria behind Neisseria gonorrhoeae and Neisseria meningitidis are matched 80-90%.