Micrococcus



Micrococcus is a genus of spherical bacteria G+ (Gram positive) cocci. On the preparations stained by Gram appears blue to dark purple. The size of individual cells ranges from 0,5 to 3 μm. This bacterium is part of human microflora (for example Micrococcus luteus On the surface of the skin), it also occurs in aqueous media, in dust and soils. The similarity of individual subgroups of micrococcocks is low, sometimes up to 50%, and therefore are often included in other groups. Other families of bacteria, such as Kuchuria Kristinae or Sedentarius, Neisserie, are derived from them.

Micrococci cells contain plasmidy by size 1 to 100 MDA ((unified) atomic weight unit, dalton). The genome of the genus is rich at G (Guanine) a C (Cysteine) baz connected by three hydrogen bonds, that brings more stability. The percentage is about 65 to 75% GC.

Typically group up to terade and packets

Pathogenesis
Micrococcus occurs physiologically in the human body. Bacteria can have pathogenic influence, especially if it is weakened immune system (For example, as a result of infection HIV).For this reason, its certificate is more difficult to laboratory tests. Micrococcaps can be associated with by other infection, including bacteremia, septic shock, septické artritidy, endocarditis, meningitis and cavitation pneumonia (immunosuppressive patients).

Representatives
Micrococcus luteus, Micrococcus roseus, Micrococcus lylae, and more.

Related articles

 * Portal: Atlas microbiological cultivation