Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Streptococcaceae, Genus Streptococcus, Streptococcus orisuis
Takada and Hirasawa 2007.
Member of the "mutans group".
No reaction with Lancefield antisera.
Gram-positive, 0.5-0.75 um, nonmotile, nonspore-forming, cocci, arranged in pairs or
Nonhemolytic on blood agar, white, small colonies; 0.75-1.0 mm in diameter.
Facultatively anaerobic (microaerophilic), optimal growth at 37.0 ºC. Grows on:
Trypticase soy agar with 5% defibrinated horse blood, Mitis salivarius agar.
Isolated from swine oral cavity. Resistant to bacitracin.
Oral bacteria, cariogenic activity is favorized by an adhesive, insoluble glucan produced from sucrose.
- Kazuko Takada and Masatomo Hirasawa: Streptococcus orisuis sp. nov., isolated from the pig oral cavity. Int J Syst Evol Microbiol
57 (2007), 1272-1275.
- TAKADA Kazuko ; IGARASHI Mitsuhiko ; YAMAGUCHI Yasutaka ; HIRASAWA Masatomo: New serotype of mutans streptococci
isolated from pig oral cavity. Microbiology and immunology 2008, vol. 52, no2, pp. 64-68.
- Kazuko Takada, Kazuhiko Hayashi, Yutaka Sato, and Masatomo Hirasawa. Streptococcus dentapri sp. nov., isolated from the wild
boar oral cavity. Int J Syst Evol Microbiol April 2010 60:820-823.
Most of biochemical characteristics were tested on API commercial kits.
Positive results for alanine phenylalanine, proline arylamidase, beta-glucosidase, alpha-glucosidase, alpha-galactosidase, acid
phosphatase, leucine arylamidase, valine arylamidase, cystine arylamidase, Voges-Proskauer reaction, acid production from
D-glucose, galactose, D-fructose, D-mannose, mannitol, sorbitol, N-acetylglucosamine, amygdalin, arbutin, aesculin, salicin,
cellobiose, maltose, lactose, melibiose, sucrose, trehalose, inulin, D-raffinose, beta-gentiobiose, methyl beta-D-glucopyranoside &
Negative results for arginine dihydrolase, alkaline phosphatase, catalase, beta-glucuronidase, beta-galactosidase, N-acetyl-beta-
glucosaminidase & hippurate hydrolysis.
(c) Costin Stoica