Streptococci can be benign, opportunistic or pathogenic.
Streptococcus. thermophilus, for example, is found in fermented milk products, and is generally used in the production of yogurt, helping to increase populations of Lactobacilli. Streptococcus sanguinis lives in the mouth is protects from cavities but might be associated with halitosis. Other halitosis-related streptococci include Streptococcus salivarius, Streptococcus parasanguinis, Streptococcus mitis, and Streptococcus oralis. Streptococcus pneumoniae lives in the in the area extending from the back of the nasal cavity to the throat of healthy individuals and turns into an invader when the individual's immune system weakens or microbiota gets disrupted. In addition to pneumonia, it can cause bronchitis, rhinitis, acute sinusitis, ear infection (otitis media), pink eye (conjunctivitis), meningitis, bacteremia, sepsis, osteomyelitis, joint infection (septic arthritis), heart issues (endocarditis), peritonitis, pericarditis, cellulitis, and brain abscess.
OrganismGenBank accession no.Genome size (nt)G+C content (%)No. of CDSNc
S. agalactiae A909 CP0001142,127,83935199644.9
S. agalactiae NEM316 AL7326562,211,48535209445.2
S. agalactiae 2603VR AE0099482,160,26735212445.1
S. anginosus F0211 AECT000000001,993,70938203550.6
S. bovis ATCC 700338 AEEL000000002,050,89337208844.5
S. downei F0415 AEKN000000002,239,42143220454.4
S. dysgalactiae subsp. equisimilis GGS-124 AP0109352,106,34039209450.3
S. equi subsp. equi 4047 FM2048832,253,79341200152.6
S. equi subsp. zooepidemicus FM2048842,149,86841186952.4
S. equi subsp. zooepidemicus MGCS10565 CP0011292,024,17141189352.3
S. gallolyticus subsp. gallolyticus TX20005 AEEM000000002,214,09137221844.5
S. gallolyticus UCN34 FN5972542,350,91137222344.4
S. gordonii str. Challis substr. CH1 CP0007252,196,66240205152.4
S. infantis SK1302 AEDY000000001,792,25239210248.9
S. infantarius subsp. infantarius ATCC BAA-102 ABJK000000001,925,08737205144.0
S. mitis B6 FN5680632,146,61139200450.4
S. mitis SK321 AEDT000000001,873,70240175749.8
S. mutans NN2025 AP0106552,013,58736189546.4
S. mutans UA159 AE0141332,030,92136196046.5
S. oralis ATCC 35037 AEDW000000001,884,71241179351.4
S. parasanguinis ATCC 15912 ADVN000000002,124,73041203552.8
S. parasanguinis F0405 AEKM000000002,050,30241197852.9
S. pneumoniae AP200 CP0021212,130,58039221650.3
S. pneumoniae ATCC 700669 FM2111872,221,31539199050.0
S. pneumoniae CGSP14 CP0010332,209,19839220650.3
S. pneumoniae D39 CP0004102,046,11539191449.8
S. pneumoniae G54 CP0010152,078,95339211450.0
S. pneumoniae Hungary19A-6 CP0009362,245,61539215550.2
S. pneumoniae INV104 FQ3120302,142,12239182449.9
S. pneumoniae INV200 FQ3120292,093,31739193050.0
S. pneumoniae JJA CP0009192,120,23439212350.2
S. pneumoniae OXC141 FQ3120272,036,86739182449.9
S. pneumoniae P1031 CP0009202,111,88239207350.1
S. pneumoniae R6 AE0073172,038,61539204250.1
S. pneumoniae Taiwan19F-14 CP0009212,112,14839204450.1
S. pneumoniae TCH843119A CP0019932,088,77239227550.4
S. pneumoniae TIGR4 AE0056722,160,84239210550.0
S. pneumoniae 670-6B CP0021762,240,04539235250.4
S. pneumoniae 70585 CP0009182,184,68239220250.1
S. pseudoporcinus SPIN 20026 AENS000000002,111,37236203048.6
S. pyogenes MGAS315 AE0140741,900,52138186549.1
S. pyogenes MGAS2096 CP0002611,860,35538189849.4
S. pyogenes MGAS5005 CP0000171,838,55438186548.9
S. pyogenes MGAS6180 CP0000561,897,57338189448.9
S. pyogenes MGAS8232 AE0099491,895,01738183949.0
S. pyogenes MGAS9429 CP0002591,836,46738187749.0
S. pyogenes MGAS10270 CP0002601,928,25238198649.0
S. pyogenes MGAS10394 CP0000031,899,87738188649.2
S. pyogenes MGAS10750 CP0002621,937,11138197949.1
S. pyogenes M1 GAS AE0040921,852,44138169648.8
S. pyogenes NZ131 CP0008291,815,78538170048.8
S. pyogenes SSI-1 BA0000341,894,27538185949.1
S. pyogenes str. Manfredo AM2950071,841,27138174548.9
S. salivarius SK126 ACLO000000002,128,33240199247.0
S. sanguinis ATCC 49296 AEPO000000002,054,85241201351.7
S. sanguinis SK36 CP0003872,388,43543227054.5
S. sanguinis VMC66 AEVH000000002,311,94943226054.5
S. suis BM407 FM2520322,146,22941193252.0
S. suis GZ1 CP0008372,038,03441197952.4
S. suis P17 AM9460162,007,49141182451.9
S. suis SC84 FM2520312,095,89841189852.0
S. thermophilus CNRZ1066 CP0000241,796,22639191547.0
S. thermophilus LMD-9 CP0004191,856,36839170946.8
S. thermophilus LMG 18311 CP0000231,796,84639188846.9
S. thermophilus ND03 CP0023401,831,94939191946.8
S. uberis 0140J AM9460151,852,35236176246.4
S. vestibularis F0396 AEKO000000002,022,28939197947.1