meningococcus

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Related to meningococci: meningococcal vaccine, pneumococci

meningococcus

 [mĕ-ning″go-kok´us]
a microorganism of the species Neisseria meningitidis, the cause of some types of meningitis. adj., adj meningococ´cal.

Neis·se·ri·a me·nin·gi·'ti·dis

a bacterial species found in the nasopharynx of humans but not in other animals; the causative agent of meningococcal meningitis and meningicoccemia; virulent organisms are strongly gram negative and occur singly or in pairs; in the latter case the cocci are elongated and are arranged with long axes parallel and facing sides kidney shaped; groups characterized by serologically specific capsular polysaccharides are designated by capital letters (the main serogroups being A, B, C, and D).

meningococcus

/me·nin·go·coc·cus/ (mĕ-ning″go-kok´us) pl. meningococ´ci   an individual organism of Neisseria meningitidis. meningococ´calmeningococ´cic

meningococcus

(mə-nĭng′gə-kŏk′əs, -nĭn′jə-)
n. pl. meningo·cocci (-kŏk′sī, -kī)
A bacterium (Neisseria meningitidis) that causes cerebrospinal meningitis.

me·nin′go·coc′cal (-kŏk′əl), me·nin′go·coc′cic (-kŏk′sĭk) adj.

meningococcus

[mining′gōkok′əs] pl. meningococci [-kok'sī]
Etymology: Gk, meninx + kokkos, berry
a bacterium of the genus Neisseria meningitidis, a nonmotile gram-negative diplococcus, frequently found in the nasopharynx of asymptomatic carriers, that may cause septicemia or epidemic cerebrospinal meningitis. Meningococcal infections are not highly communicable. However, crowded conditions, such as may be found in army camps and college dormitories, concentrate the number of carriers and reduce individual resistance to the organism. Hemorrhagic skin lesions are significant clues to the diagnosis. Stained smears of these lesions or of cerebrospinal fluid must be examined quickly because meningococci are fragile and lyse readily. Early treatment with an appropriate antibiotic such as penicillin G is essential for cure. Contacts may receive prophylaxis with rifampin. Several meningococcal vaccines are available. See also meningitis. meningococcal, adj.

Neis·se·ri·a me·nin·gi·ti·dis

(nī-sēr'ē-ă men-in-jit'i-dis)
A species found in the nasopharynx; the causative agent of meningococcal meningitis. Virulent organisms are strongly gram-negative and occur singly or in pairs; in the latter case the cocci are elongated and are arranged with long axes parallel and facing sides kidney shaped. Groups characterized by serologically specific capsular polysaccharides are designated by capital letters (the main serogroups being A, B, C, and D).
Synonym(s): meningococcus.
References in periodicals archive ?
The data from this co-culture model system suggest that meningococci may undergo important transcriptional changes when they enter the human nasopharynx and encounter resident bacterial populations.
The median age of patients with SYMD was 16 years compared with 2 years for patients with disease caused by non-serogroup Y meningococci.
Rifampin is indicated in the treatment of all forms of tuberculosis and for the treatment of asymptomatic carriers of Neisseria meningitidis to eliminate meningococci from the nasopharynx.
For meningococci, a penicillin MIC >2 mg/L is caused by plasmid-mediated [beta]-lactamase production but is extremely rare (9).
Vaccines covered by the Agreement include those for the prevention of diseases caused by Group A streptococci, Group B streptococci, Pneumococci, Group B meningococci, anthrax bacilli and urinary tract infection (UTI) associated E.
Most of these epidemics are caused by serogroup A meningococci.
About half of septic cerebrospinal fluids now have meningococci," said Dr.
After its identification in 1974, serogroup B meningococci belonging to the ET-5 complex subsequently caused epidemics in Europe, Cuba, and South America (2).
The laboratory was the first in the world to automate the multi-locus sequence typing (MLST) procedure that is now used routinely in Scotland as a tool for the genotypic characterization of meningococci.
Carriage of meningococci by university students, United Kingdom.
01, Fisher's exact test) and from a collection of 256 group C meningococci isolated between 1986 and 1989 (p 0.
Meningococcemia is so much more deadly than meningitis because, like all gram-negative bacteria, the meningococci incorporate in their cell walls a poisonous molecule called endotoxin.