What is non-pathogenic Neisseria?

CONCLUSION. Commensal Neisseria are normal oro-nasopharyngeal flora and, with the exception of N. meningitidis, appear to not cause disease in healthy individuals. However, they may have a physiological role in modulating colonization by potential pathogens, as highlighted by the inhibition of oro-nasopharyngeal N.

What does Neisseria Subflava do?

Neisseria subflava is a family of the so-called commensal Neisseria that is a part of the normal oral flora. Commensal Neisseria is a rare cause of invasive diseases such as meningitis, endocarditis, bacteremia, ocular infections, pericarditis, empyema, peritonitis, septic arthritis, bursitis, and osteomyelitis (1).

Where can you find Neisseria Subflava?

Neisseria subflava is a common inhabitant found in the human upper respiratory tract. It is a gram-negative diplococcus.

Is Neisseria Subflava a bacteria?

The commensal bacterium Neisseria subflava comprises part of the normal flora of the oral cavity and respiratory tract of humans (13). Infrequently, N. subflava can enter the submucosa and cause opportunistic infections, such as meningitis, septicemia, and endocarditis (19).

Are all Neisseria pathogenic?

PATHOGENICITY/TOXICITY: Neisseria spp. are part of the commensal flora of mucosal membranes of humans and some animals, and are generally considered non-pathogenic except for N. gonorrhoea and N. meningitidis 1.

Where does Neisseria grow?

Neisseria spp. grow best aerobically in an atmosphere containing 5–10% carbon dioxide at a temperature of 89.6–98.6°F (32–37°C) and a pH of 7–7.5. Cell size ranges from 0.6 to 1.5 mm depending upon the species source of the isolate and the age of the culture.

How do I know if I have Neisseria spp?

N. meningitidis can be identified using Kovac’s oxidase test and carbohydrate utilization. If the oxidase test is positive, carbohydrate utilization testing should be performed. If the carbohydrate utilization test indicates that the isolate may be N.

What does Neisseria do?

It functions as an endotoxin, protects against antimicrobial peptides, and adheres to the asialoglycoprotein receptor on urethral epithelium. LOS is highly stimulatory to the human immune system.

Is Neisseria harmful to humans?

Where does Neisseria come from?

History. The genus Neisseria is named after the German bacteriologist Albert Neisser, who in 1879 discovered its first example, Neisseria gonorrhoeae, the pathogen which causes the human disease gonorrhea.