Table 1.

Key tests for species identification of streptococcus anginosus.

Name	β-D fucosidase	β-D acetyl semi-glycosidase	Neuramidinase	Hyaluronidase
S. anginosus	−	−	−	−
S.constella subsp constellatus	−	−	−	+
S. constellatus subsp pharynges	+	+	−	V
S. intermedius	+	+	+	+

“+“ indicates that more than 90% of the strains are positive, “−“ indicates that more than 90% of the strains are negative, and “V” indicates that 11% −89% of the strains are positive.