... reco! gnized and extensively studied bacteria that often get more attention during the winter is Streptococcus. There are different strains of strep. Depending on their ability of hemolysis of blood agar, strep can be subdivided into a, b and g hemolytic (1-pp143). There are many different laboratory tests that can be done to distinguish one strep from the other. Different treatments ... peptidoglycan. Peptidoglycan can retain the violet blue, and does not wash off with alcohol. It grows in short chains, containing several streptococci. It looks a lot like a string of beads. Blood agar...

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