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ID Board Review/Bacterial Diseases/Gram-positive cocci (GPC)
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Medically Significant GPC
Staphylococcus spp
Staphylococcus aureus
Coagulase Negative Staphylococcus (CoNS)
Staphylococcus epidermidis
Streptococcus spp
Streptococcus pneumoniae
Streptococcus viridans
Streptococcus pyogenes (GAS)
Streptococcus agalactiae (GBS)
Enterococcus spp
+Gram Positive Cocci CharacteristicsBacteriaHistologyCatalaseCoagulaseHemolysisOptochinBacitracinStaphylococcus spp"Grape-like" clustersPositivePositiveCONS -PositiveNegativeStreptococcus sppPairs and chainsNegative -S. pneumoniaePairs and chainsNegative -α-hemolysisSensitiveS. viridansPairs and ChainsNegative -α-hemolysisResistantS. pyogenesPairs and ChainsNegative -β-hemolysisSensitiveS. agalactiaePairs and ChainsNegative -β-hemolysisResistant
CONS- Coagulase Negative Staph