Species of bacterium
Streptococcus thermophilus formerly known as Streptococcus salivarius subsp. thermophilus [ 2] [ 1] is a gram-positive bacterium , and a fermentative facultative anaerobe , of the viridans group.[ 3] It tests negative for cytochrome , oxidase , and catalase , and positive for alpha-hemolytic activity.[ 3] It is non-motile and does not form endospores .[ 3] S. thermophilus is fimbriated .[ 4]
It is also classified as a lactic acid bacterium .[ 5] S. thermophilus is found in fermented milk products and is generally used in the production of yogurt ,[ 6] alongside Lactobacillus delbrueckii subsp. bulgaricus . The two species are synergistic, and S. thermophilus probably provides L. d. bulgaricus with folic acid and formic acid , which it uses for purine synthesis.[ 7]
S. thermophilus has an optimal growth temperature range of 35–42 °C (95–108 °F), while L. d. bulgaricus has an optimal range of 43–46 °C (109–115 °F).[ 8]
^ a b "Validation of the Publication of New Names and New Combinations Previously Effectively Published Outside the IJSB: List No. 54" . International Journal of Systematic Bacteriology . 45 (3): 619– 620. July 1995. doi :10.1099/00207713-45-3-619 .
^ Tannock, Gerald W., ed. (2005). Probiotics And Prebiotics: Scientific Aspects . Caister Academic Press. p. 43. ISBN 978-1-904455-01-1 . Retrieved 31 March 2014 .
^ a b c "Bacteria Genomes – Streptococcus Thermophilus " . European Bioinformatics Institute. Archived from the original on 19 February 2013.
^ "Streptococcus_salivarius" .
^ Courtin, P.; Rul, F. O. (2003). "Interactions between microorganisms in a simple ecosystem: yogurt bacteria as a study model" . Le Lait . 84 (1– 2): 125– 134. doi :10.1051/lait:2003031 .
^ Kiliç, A. O.; Pavlova, S. I.; Ma, W. G.; Tao, L. (1996). "Analysis of Lactobacillus phages and bacteriocins in American dairy products and characterization of a phage isolated from yogurt" . Applied and Environmental Microbiology . 62 (6): 2111– 6. Bibcode :1996ApEnM..62.2111K . doi :10.1128/AEM.62.6.2111-2116.1996 . PMC 167989 . PMID 8787408 .
^ Sieuwerts, S.; Molenaar, D.; Van Hijum, S. A. F. T.; Beerthuyzen, M.; Stevens, M. J. A.; Janssen, P. W. M.; Ingham, C. J.; De Bok, F. A. M.; De Vos, W. M.; Van Hylckama Vlieg, J. E. T. (2010). "Mixed-Culture Transcriptome Analysis Reveals the Molecular Basis of Mixed-Culture Growth in Streptococcus thermophilus and Lactobacillus bulgaricus " . Applied and Environmental Microbiology . 76 (23): 7775– 7784. Bibcode :2010ApEnM..76.7775S . doi :10.1128/AEM.01122-10 . PMC 2988612 . PMID 20889781 .
^ Lyn C. Radke-Mitchel; W. E. Sandine (1986). "Influence of Temperature on Associative Growth of Streptococcus therrnophilus and Lactobacillus bulgaricus " . J. Dairy Sci . 69 (10): 2558– 2568. doi :10.3168/jds.S0022-0302(86)80701-9 . PMID 3805441 .