Rothia mucilaginosa is a Gram-positive, coagulase-negative, encapsulated, non-spore-forming and non-motile coccus, present in clusters, tetrads or pairs that is a part of the normal oropharyngeal flora.

R. mucilaginosa is a cohabitant in the lower airways of patients with chronic lung diseases such as bronchiectasis,[5] however has been shown to elicit anti-inflammatory effects.

[6] Rothia mucilaginosa is a Gram-positive, coagulase-negative, encapsulated, non-spore-forming and non-motile coccus, present in clusters, tetrads or pairs.

[3] Rothia mucilaginosa is a common oropharyngeal commensal bacteria that has also been detected in the lower airways of people with Bronchiectasis.

The inhibition of COX-2 improved survival in mice, suggesting that the pathogenic effects of R. mucilaginosa are related to the induction of COX-2[7] It is also closely associated with Bacteremia, sepsis, and endocarditis.