Viridans Group Streptococci
Viridans may refer to: *''Viridans streptococci'', large group of bacteria species *''Achatinella viridans'', species of mollusc *''Aerococcus viridans'', species of bacteria *''Apotoforma viridans'', species of moth *''Blennidus viridans'', species of ground beetle *''Ericydeus viridans'', species of true weevil *''Eucalyptus socialis subsp. viridans'', species of plant *''Gymnopilus viridans'', species of mushroom *''Pasimachus viridans'', species of ground beetle *''Peucetia viridans'', species of spider *''Sorotacta viridans'', species of moth *''Synema viridans'', species of crab spider *''Thalassomonas viridans'', species of bacteria *''Trichiotinus viridans'', species of beetle {{Taxonomy disambiguation ...
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Viridans Streptococci
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. 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,Dorland's Illustrated Medical Dictionary, headword "streptococcus", subentry "viridans streptococci". viridans group streptococci (VGS), or viridans streptococcal species. These species possess no Lancefield antigens. In general, pathogenicity is low. Identification Viridans streptococci can be differentiated from ''Streptococcus pneumoniae'' using an optochin test, as viridans st ...
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