TABLE 2.

Comparison of the major phenotypic characteristics among S. intermedius, S. anginosus, S. constellatus, S. gordonii, S. sanguis, and HKU4

Phenotypic characteristicResult for Streptococcus species
S. intermediusS. anginosusS. constellatusS. gordoniiS. sanguisHKU4
Hemolysisα, βα, βα, βααα
Lancefield serogroup−, F, G−, A, C, F, G−, A, G
Hydrolysis of:
    Esculin++++Va+
    Hippurate
    Arginine++++V+
Voges-Proskauer test+++ b +
Pyrrolidonylaryl-amidase
α-galactosidase + VV
β-glucuronidase
β-galactosidase +
Alkaline phosphatase + + + + V
Utilization of:
    Ribose
    Mannitol +
    Sorbitol
    Lactose++ +++
    Trehalose++++++
    Inulin + V
    Raffinose + V
  • a V, variable.

  • b The biochemical test results of S. intermedius, S. anginosus, S. constellatus, S. gordonii, and S. sanguis that are different from those of HKU4 are shown in bold.