Kalpana Kalpana (Editor)

Streptococcus salivarius

Updated on
Share on FacebookTweet on TwitterShare on LinkedInShare on Reddit
Domain  Bacteria
Order  Lactobacillales
Genus  Streptococcus
Higher classification  Streptococcus
Phylum  Firmicutes
Family  Streptococcaceae
Scientific name  Streptococcus salivarius
Rank  Species
Streptococcus salivarius Streptococcus salivarius Wikipedia
Similar  Bacteria, Streptococcus sanguinis, Streptococcus mitis, Streptococcus mutans, Streptococcus thermophilus

Streptococcus salivarius

Streptococcus salivarius is a species of spherical, gram-positive, facultative anaerobic bacteria that is both catalase and oxidase negative. S. salivarius colonizes (usually in chains) the mouth and upper respiratory tract of humans just a few hours after birth, making further exposure to the bacteria harmless in most circumstances. The bacteria is considered an opportunistic pathogen, rarely finding its way into the bloodstream, where it has been implicated in cases of sepsis in people with neutropenia, (a deficiency in white blood cells).


Streptococcus salivarius Strep Salivarius

S. salivarius has distinct characteristics when exposed to different environmental nutrients. For example, in the laboratory, if a growth medium is used that includes sucrose then S. salivarius is able to use the sucrose to produce a capsule around itself. However, if sucrose is replaced by glucose as on a GYC (glucose, yeast extract, calcium carbonate) plate, S. salivarius is unable to make a capsule from the glucose.

More importantly, in the laboratory, S. salivarius can show a distinct clearing on GYC plates. This is because S. salivarius can ferment the glucose yielding lactic acid. Next, the lactic acid actually reacts with the calcium carbonate in the GYC plate, resulting in zones of clearings on the plate.[1]

Streptococcus salivarius Streptococcus salivarius Aurametrix

Role as a probiotic

Streptococcus salivarius Streptococcus Thermophilus

Some strains of S. salivarius are being trialed for their use as a probiotic in the prevention of oral infections. Some strains of S. salivarius are found to produce BLIS (Bacteriocin-like Inhibitory Substances) which are antimicrobial peptides. These peptides display interspecies inhibition, and inhibit Streptococcus pyogenes (which causes Strep throat infections). Lozenges containing S. salivarius are currently available as "K12 blis throat guard lozenges". These lozenges are marketed to support immunity against more virulent Streptococcus strains. People with this strain of naturally occurring S. salivarius on their tongue have been shown to have fewer Strep throat infections. This is also being investigated for its potential to prevent rheumatic heart disease which is also caused by S. pyogenes.

Agglutination of Streptococcus salivarius is often used in the diagnosis of atypical pneumonia caused by Haemophilus influenzae


Streptococcus salivarius subsp. thermophilus, also known as Streptococcus thermophilus, is a subspecies of S. salivarius.

Streptococcus salivarius The Toothbrush Dental Floss Effect Of Streptococcus Enzyme


Streptococcus salivarius Wikipedia

Similar Topics
Streptococcus mutans
Streptococcus sanguinis