Table 2.

Phenotypic characteristics of Streptococcus pseudoporcinus and Streptococcus porcinus isolates^a

Test and phenotypic characteristic	S. pseudoporcinus human isolates (total n = 72)			S. pseudoporcinus dairy strains (total n = 6)			S. porcinus (total n = 19)
	No.	%	RXN	No.	%	RXN	No.	%	RXN
Conventional tests
Pyrase	59	83	V	6 (1)b	100	+	17 (6)	89	V
Bile esculin	30	41	V	0	0	−	1	5	−
6.5% NaCl	72	100	+	0	0	−	19	100	+
Esculin	72	100	+	6	100	+	19	100	+
Arginine	72	100	+	6	100	+	19	100	+
Hippurate	67	93	+	0	0	−	0	0	−
Pyruvate	60	83	V	0	0	−	14	74	V
Voges-Proskauer	13	18	V	6	100	+	16 (5)	84	V
CAMP	70	97	+	6	100	+	19	100	+
Acid from:
Glycerol	52	72	V	0	0	−	1	5	−
Lactose	2	3	−	6	100	+	6	32	V
Maltose	72	100	+	6	100	+	19	100	+
Mannitol	72	100	+	6	100	+	19	100	+
Ribose	72	100	+	6	100	+	19	100	+
Sorbitol	72	100	+	6	100	+	19	100	+
Sucrose	72	100	+	6	100	+	19	100	+
Trehalose	72	100	+	6	100	+	19	100	+
MGPc	69	97	+	6	100	+	14	74	V
Rapid ID 32 Strep testsd
α-Galactosidase	40	56	V	0	0	−	16	84	V
Lactose	0	0	−	6	100	+	9	43	V
Hippurate	68	94	+	6	100	+	13	68	V
Pullulan	70	97	+	0	0	−	17	89	V
M-β-Glue	5	7	−	0	0	−	12	63	V

^aNo., number of strains with positive results; RXN, expected reaction (+, 90% or more of the strains were positive; −, 90% or more of the strains were negative; V, variable [11 to 89% of the strains were positive]).

^bNumbers in parentheses indicate the number of strains with weak reactions.

^cMGP, methyl-α-d-glucopyranoside.

^dOnly differential tests are listed.

^eM-β-Glu, methyl-β-d-glucopyranoside.