Table 2 Biochemical identification of streptococcal spp
Biochemical test | S. pyogenes | S. agalactiae | S. viridans | S. pneumoniae |
|---|---|---|---|---|
Catalase |  −  |  −  |  −  |  −  |
Motility | Non-motile | Non-motile | Non-motile | Non-motile |
Growth in 6.5% NaCl |  −  |  −  |  −  |  −  |
Growth at 10 °C |  −  |  −  |  −  |  −  |
Growth at 45 °C |  −  |  −  |  −  |  −  |
Growth on MacConkey agar |  −  |  −  |  −  |  −  |
Mannitol Fermentation |  −  |  −  | Variable |  −  |
Blood hemolysis | β-hemolysis | β-hemolysis | α-hemolysis | α-hemolysis |
Sensitivity to bacitracin | Sensitive | Resistant |  −  |  −  |
Sensitivity to optochin |  −  |  −  | Resistant | Sensitive |
PYR test |  +  |  −  | na | na |
CAMP test |  −  |  +  | na | na |
Bile solubility | na | na | Insoluble | Soluble |
Inulin fermentation | na | na |  −  |  +  |