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The viridans streptococci are a large group of commensal streptococcal Gram-positive bacteria species that are α-hemolytic, producing a green coloration on blood agar plates (hence the name "viridans", from Latin "vĭrĭdis", green), although some species in this group are actually γ-hemolytic, meaning they produce no change on blood agar. [1]
The anginosus group streptococci are members of the viridans streptococci group. [1] They have been implicated as etiologic agents in a variety of serious purulent infections, but because of their heterogeneous characteristics, these organisms may be unrecognized or misidentified by clinical laboratorians. [ 2 ]
The viridans streptococci are a large group of commensal bacteria that are either alpha-hemolytic, producing a green coloration on blood agar plates (hence the name "viridans", from Latin vĭrĭdis, green), or nonhemolytic. They possess no Lancefield antigens.
This is a list of bacteria that are significant in medicine. ... viridans streptococci; B. Bacillus. ... List of human diseases associated with infectious pathogens
This is a list of infectious diseases arranged by name, along with the infectious agents that cause them, the vaccines that can prevent or cure them when they exist and their current status. Some on the list are vaccine-preventable diseases .
Streptococci. 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.
The GC content of the S. sanguinis genome is 43.4% (higher than the GC contents of other streptococci). The genome encodes 2,274 predicted proteins , 61 tRNAs , and four rRNA operons . About 22% of the open reading frames are conserved hypothetical proteins (present in multiple species but having unknown functions), and approximately 645 of the ...
Other Streptococci are also a frequent cause. Infective endocarditis due to Streptococcus bovis occurs more commonly in Europe than in North America. [11] HACEK group of bacteria are also rare causes of infective endocarditis in North America. [24] The viridans group includes S. oralis, S. mitis, S. sanguis, S. gordonii and S. parasanguis.