Staphylococcus aureus

Staphylococcus aureus is a gram positive bacteria that is a member of the Firmicutes phylum. It is found in 30% of the human population. It is often commensal but can sometimes causes disease, including infections of the skin and endocarditis. It also commonly colonizes the human gut. and can also colonize the nose.

Possible biochemical effects
S. aureus produce coagulase, an enzyme that causes blood clotting.

The presence of S. aureus in a model of the human gut decreased the production of butyrate.

Staphyloccocus bacteria produce alpha toxin

In chronic disease
Higher levels of S. aureus was found in the mouths of patients with Sjorgen's syndrome. . A higher prevalence was also found in patients with irritable bowel syndrome, and is implicated in traumatic brain injury.

Probiotics
Several probiotics were found to reduce adhesion of S. aureus to the human gut including Lactobacillus rhamnosus GG, ''Lactococcus lactis subsp. lactis and Propionibacterium freudenreichii subsp. shermanii''.

Herbs
Herbs shown to inhibit S. aureus include bacopa monnieri, green tea extracts, tumeric, milk thistle, black cumin,, cinnamon, and sophora. This may suggest a role for equilibrant and protandim in the control of S. aureus.

Mastic gum also has anti-S. aureus activity.