What is the skin microbiota and what is the skin microbiome?
Why the skin microbiome is important?
In recent years, researchers have uncovered evidence of communication between bacteria, skin cells, and immune cells. These interactions help to reinforce and repair the skin barrier while supporting the skin defences against infections and inflammation. (1)
What is the skin microbiome composition and how it is influenced by skin conditions?
Most (>90%) of bacteria of the human skin microbiome are classified into four types: Actinobacteria (52%), Firmicutes (24%), Proteobacteria (16%), and Bacteroidetes (6%). (2)
The composition of microbial communities was found to be primarily dependent on the physiology of the skin site, with changes in the relative abundance of bacterial taxa associated with moist, dry and sebaceous microenvironments. Sebaceous sites were dominated by lipophilic Propionibacterium species, whereas bacteria that thrive in humid environments, such as Staphylococcus and Corynebacterium species, were preferentially abundant in moist areas, including the bends of the elbows and the feet. (3)
Is the skin microbiome influenced by ethnicity?
Among the genetic factors shaping the skin microbiome, ethnicity appears to be secondary, but not insignificant. (2)
A study by Li et al. revealed that the skin microbiome composition of East Asian people is specific. (4)
The number of Cutibacterium on the scalp and armpits of males in Africa and Latin America is lower than in other ethnicities (Caucasian, African-American, East Asian, and South Asian). The microbiomes of the arms of African-American men and the armpits of East Asians were significantly different compared to other groups. (5)
Despite some similarities, the Chinese skin microbiome differed from other populations. (6)
How skin microbiome is tested?
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