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  2. Streptococcus thermophilus - Wikipedia

    en.wikipedia.org/wiki/Streptococcus_thermophilus

    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 ]

  3. Streptococcus - Wikipedia

    en.wikipedia.org/wiki/Streptococcus

    Bacteriophages have been described for many species of Streptococcus. 18 prophages have been described in S. pneumoniae that range in size from 38 to 41 kb in size, encoding from 42 to 66 genes each. [34] Some of the first Streptococcus phages discovered were Dp-1 [35] [36] and ω1 (alias ω-1).

  4. Streptococcus mutans - Wikipedia

    en.wikipedia.org/wiki/Streptococcus_mutans

    Streptococcus sanguinis, closely related to S. mutans and also found in the oral cavity, has been shown to cause Infective Endocarditis. [33] Streptococcus mutans has been associated with bacteraemia and infective endocarditis (IE). IE is divided into acute and subacute forms, and the bacterium is isolated in subacute cases.

  5. Streptococcus oralis - Wikipedia

    en.wikipedia.org/wiki/Streptococcus_oralis

    Streptococcus oralis is a Gram positive viridans streptococcus of the Streptococcus mitis group. [2] [3] S. oralis is one of the pioneer species associated with eubiotic dental pellicle biofilms, and can be found in high numbers on most oral surfaces. [4] [5] It has been, however, found to be an opportunistic pathogen as well. [2]

  6. Streptococcus pyogenes - Wikipedia

    en.wikipedia.org/wiki/Streptococcus_pyogenes

    However, both Streptococcus dysgalactiae and the Streptococcus anginosus group can possess group A antigen as well. Group A streptococci, when grown on blood agar, typically produce small (2–3 mm) zones of beta-hemolysis, a complete destruction of red blood cells. The name group A (beta-hemolytic) Streptococcus is thus also used. [1]

  7. Viridans streptococci - Wikipedia

    en.wikipedia.org/wiki/Viridans_streptococci

    The pseudo-taxonomic term "Streptococcus viridans" is often used to refer to this group of species, but writers who do not like to use the pseudotaxonomic term (which treats a group of species as if they were one species) prefer the terms viridans streptococci, [2] viridans group streptococci (VGS), or viridans streptococcal species.

  8. Peptostreptococcus - Wikipedia

    en.wikipedia.org/wiki/Peptostreptococcus

    Peptostreptococcus species are commensal organisms in humans, living predominantly in the mouth, skin, gastrointestinal, vagina and urinary tracts, and are members of the gut microbiota. Under immunosuppressed or traumatic conditions these organisms can become pathogenic , as well as septicemic , harming their host.

  9. Streptococcus salivarius - Wikipedia

    en.wikipedia.org/wiki/Streptococcus_salivarius

    Streptococcus salivarius is a species of spherical, gram-positive, facultative anaerobic lactic acid bacteria [1] that is both catalase and oxidase negative. S. salivarius colonizes (usually in chains) the oral cavity and upper respiratory tract of humans just a few hours after birth, making further exposure to the bacteria harmless in most circumstances.