Approximately 500 million people worldwide are carriers of the bacterium in their nasopharynx. Neisseria meningitidis is a parasitic, aerobic, gramnegative, non endospore forming, nonmotile although piliated, coccal bacterium that is responsible for causing meningitis, inflammation of the meninges layer covering the brain. Neisseria meningitidis georgia department of public health. Le genre neisseria comprend deux principales especes pathogenes. It can grow on both a blood agar plate bap and a chocolate. Ebsco neisseria meningitidis serogroup w, burkina faso, 2012. Nirtza suarez navarro, isabel martinez motas, onelkis feliano sarmiento et. During periods of endemic disease, about 10 % of the general population harbour neisseria meningitidis in the nasopharynx. Neisseria meningitidis is immediately reportable on first knowledge or suspicion of the diagnosis due to the potential need for prophylaxis of close contacts within 24 hours of suspected diagnosis suspicion is normally based on gram stain results see table on page 4. Enfermedad por meningococo, neisseria meningitidis. Neisseria meningitidis is an aerobic, gramnegative diplococcus that causes meningococcal diseases such as meningococcemia and bacterial meningitis.
Algunas neisserias son habitantes normales del aparato respiratorio humano. Binary fission is one of the most common ways for bacterial cells to reproduce. Colonies are positive by the oxidase test and most strains utilize maltose. The fact that this bacteria is gram negative means that there is very little or no peptidoglycan in the cell wall. Neisseria meningitidis the meningococcus causes significant morbidity and mortality in children and young adults worldwide through epidemic or sporadic meningitis andor septicemia. Neisseria meningitidis le meningocoque figure 1 et neisseria gonorrhoeae le gonocoque. Meningitis arises upon inflammation of the meninges, which consists of the membrane that envelops and protects the central nervous system. Feb 12, 2010 neisseria meningitidis meningococcus dr kamran afzal slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Appropriate suspending vehicle or syrup vehicle can be used for liquid suspension rifampin orders. Meningococcal disease can refer to any illness that is caused by a type of bacteria called neisseria meningitidis. Gloria ajello, mshaemophilus influenzae y neisseria meningitidis. The bacteria are spherical, ranging in diameter from 0. Quick medical attention is extremely important if meningococcal disease is suspected.
Because it is an aerobic organism, like most members of the neisseriaceae family, it also has catalase and. Pronunciation of meningitidis with 1 audio pronunciation, 1 meaning, 2 translations and more for meningitidis. Ceftriaxone given in a single intramuscular dose is effective in eradicating carriage. Most carrier isolates are shown to lack capsule production. The bacterium is referred to as a coccus because it is round, and more specifically, diplococcus because of its tendency to form pairs. Neisseria meningitidis is a gramnegative, either an encapsulated or unencapsulated, aerobic diplococcus with a kidney or coffeebean shape. Neisseria meningitidis st11 complex isolates associated with. Population structure and capsular switching of invasive neisseria meningitidis isolates in the premeningococcal conjugate vaccine eraunited states, 20002005. Neisseria meningitidis isolated from adults sputumbronchial. Il genere neisseria prende il nome da chi per primo descrisse. Meningococcus, the bacterium neisseria meningitidis, which causes meningococcal meningitis in humans, who are the only natural hosts in which it causes disease. Il genere neisseria appartiene alla famiglia delle neisseriaceae. Neisseria meningitidis wikipedia, a enciclopedia livre.
Les neisseria spp sont des bacteries a gram negatif. The neisseria meningitidis capsule is important for intracellular survival in human cells. Aunque son gram negativas, contienen endotoxinas, y. K v chakradhar assistant professor department of microbiology nriims 2. If you continue browsing the site, you agree to the use of cookies on this website. Morphology capsulated gram negative cocci in pairs diplococci 0. It can grow on both a blood agar plate bap and a chocolate agar plate cap. The natural habitat and reservoir for meningococci are the mucosal surfaces of the human nasopharynx and to a lesser extent, the urogenital tract and anal canal.
Multiple factors have been identified that predispose to the transmissibility of n. Neisseria meningitidis about neisseria meningitidis is a bacterium hosted only by humans and is a leading cause of bacterial meningitis in the united states. Neisseria meningitides is an aerobic, nonsporeforming gramnegative coccobacilli that resides in its natural habitat within the nasopharyngeal tract of humans. Neisseria meningitidis, often referred to as meningococcus, is a gramnegative bacterium that can cause meningitis and other forms of meningococcal disease such as meningococcemia, a lifethreatening sepsis. This pathogen may also cause overwhelming sepsis, purpura fulminans, or rarely benign meningococcemia. Laboratoryconfirmed bacterial meningitis cases, burkina faso, 2012 latex culture agglutination bacterium, serogroup or pcr dagger total neisseria meningitidis a 0 0 0 w 1,438 1,451 x 207 na 207 y 4 0 4 c 1 0 1 indeterminate 125 0 125 streptococcus 527 7 534 pneumoniae haemophilus influenzae 30 1 31 type b total 2,332 21 2,353 data. Caracteristicas microbiologicas del agente etiologico. Suspect cases of haemophilus influenzae may be also be reported based on gram stain results. Solo i ceppi provvisti di pili riconoscono specifici recettori sulle cellule epiteliali b. Abcs personnel routinely contacted all microbiology laboratories serving acute care hospitals in their area to identify cases. Neisseria meningitidis strains relatively resistant to penicillin were recovered from blood or cerebrospinal fluid cultures of four children treated in barcelona, spain, and surrounding areas.
Meningococcal disease neisseria meningitidis disease. Neisseria meningitidis is a bacteria that is best known for its role in endemic bacterial meningitis. Meningococcal disease is a contagious infection spread by close contact, such as living with or kissing an infected person. Neisseria meningitidis definition of neisseria meningitidis. Meningitidis is described as a gramnegative diplococci. Ciprofloxacin, administered to adults in a single oral dose is effective in. Neisseria meningitidis patogenesi ed immunita a i batteri sono in grado di colonizzare le cellule non ciliate del nasofaringe. Le specie clinicamente importanti di neisseria, ovvero n.
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