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Neisseria lactamica

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A gram-negative harmless commensal of human upper respiratory tract involved in meningococcal disease particularly in children.


Neisseria lactamica has been reveal to grow on gonococcal typified by its capability to produce acid from glucose, lactose and maltose as well as beta-galactosidase where commonly isolated from children but rarely in adults. It is known as the commensal bacterial flora of the human upper respiratory tract which happen to share the ecological niche with Neisseria meningitidis.

Neisseria lactamica has been considered to be susceptible in penicillin, cefotaxime and cefriaxone but resistant to ampicillin. It is naturally transformable in which it can transfer antibiotic resistance markers. Individual having this bacterium develops mucosal and systemic humoral immunity.

Neisseria lactamica implicated in meningococcal disease and septic arthritis particularly to individual with compromised immune system, having prior corticosteroid used in children. Colonization of this bacterium may be responsible for the increase immunity to meningococcal disease occurs during childhood. It also been studied that components of this bacterium has a potential constituents of novel meningococcal vaccines.

Scientific classification:

 Kingdom: Bacteria
 Phylum: Proteobacteria
 Class: Betaproteobacteria
 Order: Neisseriales
 Family: Neisseriaceae
 Genus: Neisseria
 Species: Neisseria lactamica

See also:

• Bacteria

• Meningococcal disease