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Streptococcus mitis is a species of Gram-positive, mesophilic, alpha-hemolytic bacteria in the genus Streptococcus. These bacteria are facultative anaerobes , and made up of non-motile and non-sporing cocci (round cells) that are catalase negative .
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]
Streptococcus constellatus: Oropharynx Streptococcus intermedius: Oropharynx Streptococcus mitis: General distribution Streptococcus pyogenes: Upper respiratory tract Streptococcus viridans: Pharynx Acinetobacter spp Anterior urethra Bacteroides spp External genitalia Candida albicans: Anterior urethra, external genitalia Corynebacterium spp
Group A streptococcal infections are a number of infections with Streptococcus pyogenes, a group A streptococcus (GAS). [1] S. pyogenes is a species of beta-hemolytic Gram-positive bacteria that is responsible for a wide range of infections that are mostly common and fairly mild. If the bacteria enters the bloodstream, the infection can become ...
S. pneumoniae, S. mitis and S. oralis can become competent, and as a result actively acquire homologous DNA for transformation by a predatory fratricidal mechanism [42] This fratricidal mechanism mainly exploits non-competent siblings present in the same niche [43] Among highly competent isolates of S. pneumoniae, Li et al. [44] showed that ...
It is usually caused by a form of Viridans group streptococcus bacteria that normally live in the mouth [3] (Streptococcus mutans, mitis, sanguis or milleri). [2] Other strains of streptococci can cause subacute endocarditis as well.
Toxic shock syndrome (TSS) is a condition caused by bacterial toxins. [1] Symptoms may include fever, rash, skin peeling, and low blood pressure. [1] There may also be symptoms related to the specific underlying infection such as mastitis, osteomyelitis, necrotising fasciitis, or pneumonia.
The older name Streptococcus milleri (as well as Streptococcus milleri group, SMG) is now pseudotaxonomic, as the idea that these streptococci constituted a single species was incorrect. The anginosus group streptococci are members of the viridans streptococci group. [ 1 ]