Staphylococcus Hominis
A skin bacterium that converts odorless gland secretions into the sharp, sulfurous smell of human underarm odor by producing thioalcohols like 3M3SH.
This bacterium is a commensal skin microbe that biotransforms odorless secretions from armpit glands into volatile, sulfur-containing compounds known as thioalcohols. Specifically, it produces 3M3SH, the primary source of the sharp, sulfurous smell characteristic of human underarm odor. Its metabolic activity is crucial for the malodour found in humans.
What this means in real life
A hospital patient with a central line catheter develops a bloodstream infection caused by this bacterium that colonized their skin around the insertion site, requiring antibiotic treatment.
What it isn’t
This is not a dangerous pathogen that causes disease in healthy people; it is a normal skin resident that only becomes problematic under specific medical circumstances like immunosuppression or invasive devices.
Commonly misused online
Social media sometimes conflates all staph bacteria as equally dangerous 'superbugs,' when in fact this species is typically harmless and only rarely causes clinical infection in vulnerable populations.