TABLE 1.

Biochemical profile of strain HKU4 by conventional biochemical tests and Vitek GPI, API 20 STREP, and ATB ID32 STREP systems

Biochemical reaction or enzymeResult by testing method
ConventionalVitek GPIAPI 20 STREPATB ID32 STREP
Catalase
Resistance to bacitracin++
Resistance to optochin++
Growth in 6% NaCl
Growth in 10% bile+
Growth in 40% bile++
Esculin hydrolysis+++
Hippurate hydrolysis
Arginine hydrolysis++++
Lysine decarboxylase
Ornithine decarboxylase
Urease
Voges-Proskauer test+++
Tetrazolium reduction+
Resistance to novobiocin++
Resistance to polymyxin B+
Utilization of:
    Hemicellulase+
    Dextrose+
    Lactose++++
    Mannitol
    Raffinose
    Salicin++
    Sorbitol
    Sucrose+++
    Trehalose++++
    Arabinose
    Pyruvate
    Pullulan++
    Inulin
    Melibiose
    Melezitose
    Cellobiose++
    Ribose
    Xylose
    D-glucose+
    D-mannose+
    Maltose+
    Starch+
    Glycogen
    Arabitol
    Methyl-B-d-glucopyranoside+
    Tagatose
    Cyclodextrin
Pyrrolidonylarylamidase
α-galactosidase
β-glucuronidase
β-galactosidase
Leucine arylamidase+
β-glucosidase+
α-galactosidase
Alanine-phenylalanine-proline arylamidase
Acetyl-β-glucosaminidase
Glycyl-tryptophane arylamidase
β-mannosidase
Nitrate reduction
Alkaline phosphatase
Identification99% S. intermedius51.3% S. intermedius, 25.8% L. lactis, 21.5% S. anginosus99.9% S. anginosus