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This Concept Map, created with IHMC CmapTools, has information related to: LAB 14 - Streptococcus and Enterococcus identification, The genus Streptococcus. examples viridans streptococci, culture on a blood agar plate with a bacitracin (Taxo A®) disc results zone of inhibition around a Taxo A® disc, group A beta streptococcus (GABS) Streptococcus pyogenes methods culture on a blood agar plate with a bacitracin (Taxo A®) disc, The genus Enterococcus. method culture on bile esculin azide agar, culture on a blood agar plate with a optochin (Taxo P®) disc results alpha hemolysis: Appears as a zone of partial hemolysis surrounding the colony, often accompanied by a greenish discoloration of the agar. This is best seen in subsurface colonies where the agar has been stabbed., group A beta streptococcus (GABS) Streptococcus pyogenes methods serologic testing (see Lab 17), streptococci: Gram-positive cocci, ttypically occurring in pairs and chains of varying length when grown in a liquid medium, and often occurring singly, in pairs, short chains, and clusters when taken from an agar culture. genera The genus Enterococcus., culture on a blood agar plate with a optochin (Taxo P®) disc results zone of inhibition around a Taxo P® disc, culture on a blood agar plate with a bacitracin (Taxo A®) disc results beta hemolysis: A clear, red blood cell-free zone surrounding the colony, where a complete lysis of the red blood cells by the bacterial hemolysins has occurred. This is best seen in subsurface colonies where the agar has been stabbed., The genus Streptococcus. examples group A beta streptococcus (GABS) Streptococcus pyogenes, streptococci: Gram-positive cocci, ttypically occurring in pairs and chains of varying length when grown in a liquid medium, and often occurring singly, in pairs, short chains, and clusters when taken from an agar culture. genera The genus Streptococcus., culture on a blood agar plate with a optochin (Taxo P®) disc results mucoid, transluscent colonies, The genus Streptococcus. examples Streptococcus pneumoniae (the pneumococcus), Streptococcus pneumoniae (the pneumococcus) method culture on a blood agar plate with a optochin (Taxo P®) disc, culture on a blood agar plate with a bacitracin (Taxo A®) disc results very small, white to grey colonies approximately 1mm in diameter, culture on bile esculin azide agar results Enterococcus species grow on selectice bile esculin azide agar and hydrolize esculin., viridans streptococci blood agar typically show alph hemplysis or gamma reaction