TABLE 4.

Phenotypic characteristics of SIG strains

Test and characteristic	% Positive strains
	S. pseudintermedius (n = 83)	S. intermedius (n = 12)	S. delphini
			Group A (n = 17)	Group B (n = 5)
ID 32 Staph
Urease	100	100	88	100
Arginine dihydrolase	100	0	100	80
Ornithine dihydrolase	0	0	0	0
Esculin hydrolysis	0	0	0	0
Acid production from:
Glucose	100	100	100	100
Fructose	100	100	100	100
d-Mannose	100	100	100	80
d-Maltose	91	91	94	100
Lactose	100	73	94	40
Trehalose	100	100	94	80
d-Mannitol	46	100	71	60
Raffinose	0	0	0	40
d-Ribose	100	100	100	100
d-Cellobiose	0	0	0	20
Saccharose	100	100	59a	80
N-Acetylglucosamine	100	18a	100	100
d-Turanose	0a	0	0	0a
l-Arabinose	0	0	0	20
Nitrate reduction	100	100	100	100
Acetoin (Vogues-Proskauer)	10	0	0	20
β-Galactosidase	100	100	100	100
Arginine arylamidase	0	0	0	0
Alkaline phosphatase	99	100	100	100
Pyrrolidonyl arylamidase	100	100	100	100
Novobiocin resistance	0	0	18	60
β-Glucuronidase	0	0	0	0
Acid production from:
d-Mannitol (anaerobically)	0	100	0	0
d-Galactose	92	0a	94	100
Arbutin	0	0a	0	0
β-Gentiobiose	0	100	0	60
d-Turanose (48 h)	17a	0	0	40a
Acetoin production (Vogues-Proskauer)	66	0	5	0
MIC of polymixin B (Etest)
Range (mg/ml)	16-32	8-12	12-32	24
Geometric mean (mg/ml)	25	11	22	24

^aMany of the strains showed a weak reaction and were designated as being negative.