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Staphylococcus aureus Catalase positive MSA Mannitol fermentation positive
MRSA Methicillin resistan Staphylococcus aureus
Staphylococcus epidermidis MSA negative for Mannitol fermentation Novobiocin susceptible
Staphylococcus saprophyticus MSA negative for Mannitol fermentation Novobiocin resistant
Streptococcus Genus Gram positive cocci in chains Catalase negative
Staphylococcus Genus Gram positive cocci in clusters Catalase positive
Streptococcus pyogenes Streptococcus Group A (GAS) Beta hemolytic
Streptococcus agalactiae Streptococcus Group B (GBS) Beta hemolytic
Streptococcus pneumoniae Alpha hemolytic capsulated pathogenic
Viridans Streptococci Alpha hemolytic Many oral normal flora
Enterococcus faecalis Alpha or Gamma hemolytic
Group A Streptococcus Pharyngitis, necrotizing fasciitis, Impetigo, Cellulitis
Group B Streptococcus Neonatal infection (mother's normal vaginal flora)
Streptococcus pneumoniae Lobar pneumonia, sepsis immunocompromised patients