Firmicutes
Streptococcus pneumoniae
The Firmicutes (Latin firmus " strong," cutis "skin" ) form a species-rich tribe within the domain of the bacteria.
The Firmicutes, together with the Actinobacteria, the large group of Gram -positive bacteria. They differ from Actinobacteria, however, inter alia, by their lower GC content. Many can form resistant endospores, some live phototrophic, some species syntroph, play other than pathogens play an important role.
Today it is one of the Firmicutes following classes
- Bacilli ( predominantly aerobic)
- Clostridia (anaerobic to aero -tolerant)
- Erysipelotrichia
- Mollicutes ( wall-less parasites).
- Negativicutes
- Thermolithobacteria
Important examples can be found among others in the genera Streptococcus, Lactococcus, Lactobacillus, Mycoplasma, Bacillus and Clostridium.