| Streptococcus dentisani |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Bacillota (Firmicutes), Class Bacilli, Order Lactobacillales, Family Streptococcaceae, Genus Streptococcus, Streptococcus
dentisani Camelo-Castillo et al. 2014.
Member of the "Mitis" group.
Jensen et al. 2016 proposed the reclasification of Streptococcus dentisani as Streptococcus oralis subsp. dentisani comb. nov.
dentisani Camelo-Castillo et al. 2014.
Member of the "Mitis" group.
Jensen et al. 2016 proposed the reclasification of Streptococcus dentisani as Streptococcus oralis subsp. dentisani comb. nov.
Gram-positive cocci, occurring in short chains. Non-motile. Non-spore-forming.
Colonies on BHI plates at 37 ºC under aerobic conditions, after 48 h of incubation are
white pin-point, with a mean colony size of 1.5 mm in diameter. Alpha-haemolytic on
Columbia blood agar (after 48h aerobic incubation at 37 ºC. Temperature range
between 34 ºC to 40 ºC under aerobic conditions. Optimum pH ranges between 6.0
and 7.5. Can grow down to pH 5.5. Facultatively anaerobic.
white pin-point, with a mean colony size of 1.5 mm in diameter. Alpha-haemolytic on
Columbia blood agar (after 48h aerobic incubation at 37 ºC. Temperature range
between 34 ºC to 40 ºC under aerobic conditions. Optimum pH ranges between 6.0
and 7.5. Can grow down to pH 5.5. Facultatively anaerobic.
Isolated from human dental surfaces.
Isolated from caries-free tooth surfaces.
- Anny Camelo-Castillo, Alfonso Benítez-Páez, Pedro Belda-Ferre, Raul Cabrera-Rubio, Alex Mira. Streptococcus dentisani sp. nov.,
a novel member of the mitis group. Int. J. Syst. Evol. Microbiol., 64, 60-65. - Jensen A, Scholz CF, Kilian M. Re-evaluation of the taxonomy of the Mitis group of the genus Streptococcus based on whole
genome phylogenetic analyses, and proposed reclassification of Streptococcus dentisani as Streptococcus oralis subsp.
dentisani comb. nov., Streptococcus tigurinus as Streptococcus oralis subsp. tigurinus comb. nov., and Streptococcus
oligofermentans as a later synonym of Streptococcus cristatus. Int J Syst Evol Microbiol 2016; 66:4803-4820.
Most tests were performed using API Strep and API 50 CH kits.
Positive results for alkaline phosphatase, alpha-galactosidase, acid production from: fructose, lactose, maltose and raffinose.
Negative for beta-glucosidase, hippuric acid, Voges-Proskauer reaction, acid production from: amygdalin, arbutin, cellobiose,
galactose, gentibiose, glucose (negative in API test, but positive in other test), inulin, mannose, ribose, starch, sucrose and trehalose.
Positive results for alkaline phosphatase, alpha-galactosidase, acid production from: fructose, lactose, maltose and raffinose.
Negative for beta-glucosidase, hippuric acid, Voges-Proskauer reaction, acid production from: amygdalin, arbutin, cellobiose,
galactose, gentibiose, glucose (negative in API test, but positive in other test), inulin, mannose, ribose, starch, sucrose and trehalose.
(c) Costin Stoica
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