Does Neisseria meningitidis grow anaerobically?

Neisseria meningitidis does not grow anaerobically.

Is bacterial meningitis aerobic or anaerobic?

The human pathogen Neisseria meningitidis is the major causative agent of bacterial meningitis. The organism is usually treated as a strict aerobe and is cultured under fully aerobic conditions in the laboratory.

Is gonorrhea aerobic?

It causes the sexually transmitted genitourinary infection gonorrhea as well as other forms of gonococcal disease including disseminated gonococcemia, septic arthritis, and gonococcal ophthalmia neonatorum. It is oxidase positive and aerobic, and it survives phagocytosis and grows inside neutrophils.

What are the characteristics of Neisseria?

Neisseria spp. are a Gram-negative non-spore-forming diplococcus that has a flattened shape; its size ranges between 0.60.8 m. They are oxidase-positive, non-acid-fast cocci or plump rods. They can reach a diameter of around 0.60.8 m and sometimes up to 1.0 2.03.0 m.

Does Neisseria meningitidis grow on blood agar?

N. meningitidis is a fastidious organism, which grows best at 35-37C with ~5% CO2 (or in a candle-jar). It can grow on both a blood agar plate (BAP) and a chocolate agar plate (CAP).

Is Neisseria motile?

Motility: Non-motile. Capsules: Capsules and fimbriae (pili) may be present.

Is Neisseria meningitidis intracellular or extracellular?

To cause meningitis the extracellular pathogen Neisseria meningitidis has to traverse the blood-cerebrospinal fluid (B-CSF) barrier. Postulating a transcellular passage, meningococci (MC) have been shown to adhere to and enter B-CSF barrier forming human brain microvascular endothelial cells (HBMEC).

Is Neisseria meningitidis encapsulated?

Neisseria meningitidis meningitidis organisms are encapsulated, or surrounded by a polysaccharide capsule. This capsular polysaccharide is used to classify N. meningitidis into 12 serogroups. Six of these serogroups cause the great majority of infections in people: A, B, C, W135, X, and Y (12).

Is Neisseria meningitidis hemolytic?

Neisseria meningitidis grows on them without hemolysis. Colonies of Neisseria meningitidis are unpigmented and appear round, smooth, glistening, and convex, with a clearly defined edge. Some strains may produce larger, grey, opaque colonies.

Are Neisseria anaerobic?

Abstract. Neisseria gonorrhoeae is generally considered to be an obligate aerobe; it can, however, grow in the absence of oxygen by anaerobic respiration by using nitrite as a terminal electron acceptor.

Is chlamydia aerobic or anaerobic?

Chlamydia trachomatis is part of the chlamydophila genus. These bacteria are gram-negative, anaerobic, intracellular obligates that replicate within eukaryotic cells.

Is Neisseria Gram positive or negative?

Structure. Neisseria species are Gram-negative cocci, 0.6 to 1.0 m in diameter. The organisms are usually seen in pairs with the adjacent sides flattened. Pili, hairlike filamentous appendages extend several micrometers from the cell surface and have a role in adherence.

Where is Neisseria found in the body?

upper respiratory tract Abstract. The Gram-negative bacteria genus Neisseria includes both pathogenic and commensal species that are found primarily in the upper respiratory tract of humans and animals.

What causes Neisseria?

Bacteria called Neisseria meningitidis cause meningococcal disease. About 1 in 10 people have these bacteria in the back of their nose and throat without being ill. This is called being ‘a carrier’.

What does Neisseria do?

Neisseria is a large genus of bacteria that colonize the mucosal surfaces of many animals. Of the 11 species that colonize humans, only two are pathogens, N. meningitidis and N. gonorrhoeae.

Is Neisseria meningitidis intracellular?

The Neisseria meningitidis Capsule Is Important for Intracellular Survival in Human Cells Infection and Immunity.

Is Thayer Martin Agar selective or differential?

Thayer-Martin agar is a selective medium used for the isolation of gonococci (Neisseria gonorrheae) from specimens containing a mixed flora of bacteria and/or fungi e.g. urogenital specimen. Modified Thayer-Martin (MTM) agar is a GC agar base containing vancomycin, colistin, nystatin, and trimethoprim lactate (VCNT).

Is Neisseria meningitidis a commensal?

Neisseria meningitidis is a harmless commensal bacterium finely adapted to humans. Unfortunately, under privileged conditions, it adopts a devious lifestyle leading to uncontrolled behavior characterized by the unleashing of molecular weapons causing potentially lethal disease such as sepsis and acute meningitis.

Is Neisseria meningitidis motile or nonmotile?

CHARACTERISTICS: Neisseria meningitidis belongs to the family Neisseriaceae 2. It is a Gram-negative, non-spore forming, non-motile, encapsulated, and non acid-fast diplococci, which appears in kidney bean shape under the microscope 13.

Is Neisseria motile or nonmotile?

Neisseria gonorrhoeae is an aerobic gram-negative, non-spore forming, non-motile, encapsulated, and non-acid-fast bacteria, which appear in kidney bean shape under the microscope.

Do Neisseria have flagella?

Neisseria meningitidis is a member of the family Neisseriaceae, which are gram-negative coccal, coccoid or rod shaped bacteria that lack flagella and usually possesses an outer capsule, and the genus Neisseria Dankert (1999).

Does Neisseria meningitidis endospores?

Neisseria meningitidis is a parasitic, aerobic, Gram-negative, non endospore forming, nonmotile (although piliated) , coccal bacterium that is responsible for causing meningitis, inflammation of the meninges layer covering the brain.

Is Neisseria meningitidis living or dead?

As an exclusively human pathogen, it is the main cause of bacterial meningitis in children and young adults, causing developmental impairment and death in about 10% of cases. …

Neisseria meningitidis
Order: Neisseriales
Family: Neisseriaceae
Genus: Neisseria
Species: N. meningitidis

What causes Neisseria meningitidis?

What causes meningococcal infections? The Neisseria meningitidis bacteria are spread through close contact with infected people. Droplets in the air from a sneeze or close conversation can be inhaled and may cause infection. In rare cases, the bacteria grow rapidly causing serious illness in both children and adults.

Is Neisseria meningitidis preventable?

Routine vaccination of healthy persons who are not at increased risk for meningococcal disease is not recommended after age 21 years. ACIP also recommends vaccination for persons age 2 months or older at increased risk for meningococcal disease due to serogroups A, C, W, or Y.

Is Haemophilus influenzae encapsulated?

H. influenzae may be either encapsulated (typeable) or unencapsulated (nontypeable). There are 6 encapsulated serotypes (designated a through f) that have distinct capsular polysaccharides.

Is Neisseria gonorrhoeae encapsulated?

CHARACTERISTICS: Neisseria gonorrhoeae belongs to the genus Neisseria within the family Neisseriaceae 2. It is a Gram-negative, non-spore forming, non-motile, encapsulated, and non acid-fast bacteria, which appear in kidney bean shape under the microscope 1.

Does Neisseria Lactamica grow on blood agar?

Neisseria lactamica Cells are cocci occurring in pairs and produce a yellowish pigment and some strains are haemolytic on horse blood agar. Colonies resemble that of N. meningitidis but may be less moist and smaller. They utilize glucose, maltose and lactose to produce acid.

Does Neisseria meningitidis grow on nutrient agar?

catarrhalis from other commensal Neisseria. Ability to grow on nutrient agar is one of the criteria to differentiate commensal Neisseria spp. … catarrhalis from Neisseria gonorrhoeae or Neisseria meningitidis (1, 3).

Can Neisseria grow on MacConkey Agar?

Note: Neisseria does not grow on MacConkey. Note: Growth, but no fermentation of lactose. Colorless colonies, medium is slightly yellow due to the increased pH resulting from bacterial digestion of peptone in the medium. Note: Gram-positives do not grow on MacConkey.