Human axillary microbiome varies by age, gender and race/ethnicity
A recently published study has provided an unprecedented fundamental knowledge about the axillary microbiota as a function of age, gender and race/ethnicity. The work has been published in International Journal of Cosmetic Science.
Microbial community is important
The microbial community plays an important role in the generation of human axillary odor by transforming odorless natural secretions into volatile odorous molecules. A limited number of traditional culturing methods and molecular based research have been performed to characterize the human axillary microbiome in small collection sample sizes. Moreover, only a few have considered the interpersonal variations across age, gender or race/ethnicity, and none have included all three variables within one single study. The aim of this study is to characterize the axillary microbiome of healthy subjects across different age groups, genders and races/ethnicities in a large sample size.
Seniors have a higher number of total bacterial
The results indicate that more senior subjects (55+) tend to have a higher number of total bacterial than younger adults (of a defined age). The diversity of odor causing bacteria, e.g. corynebacteria, increases with age. Among the 3 races/ethnicities studied, East Asians have a unique microbial composition as compared to Caucasians and Hispanics, which may contribute to the different odor profiles observed among the races/ethnicities studied.