Actinobacteria

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Actinobacteria
Scientific classification
Kingdom:Bacteria
Phylum:Actinobacteria
Orders

Subclass Acidimicrobidae
    Acidimicrobiales
Subclass Actinobacteridae
    Actinomycetales
    Bifidobacteriales
Subclass Coriobacteridae
    Coriobacteriales
Subclass Rubrobacteridae
    Rubrobacterales
Subclass Sphaerobacteridae
    Sphaerobacterales

The Actinobacteria are a group of Gram-positive bacteria. Most are found in the soil, and they include some of the most common soil life, playing important roles in decomposition and humus formation. Some form branching filaments, which somewhat resemble the mycelia of the unrelated fungi, among which they were originally classified as the Actinomycetes. Few forms are pathogens, such as Mycobacterium. Most are aerobic, but a few, such as Actinomyces isrealii, can grow under anaerobic conditions.

The Actinobacteria correspond to the high G+C group of Gram-positive bacteria, forms whose DNA contains unusually large amounts of the bases guanine and cytosine. Representative genera include:

es:Actinobacteria nl:Actinomyces

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