Table 2.
Biochemical reactions/enzymes | Conventional | Vitek GNI+ | API 20E |
Motility | + | ||
Growth on MacConkey agar | + | ||
Nitrate reduction | + | + | |
Cytochrome oxidase | – | ||
β-Galactosidase | + | + | + |
Arginine dihydrolase | – | – | – |
Lysine decarboxylase | + | + | + |
Ornithine decarboxylase | + | + | + |
Citrate utilisation | – | – | – |
Malonate utilisatiion | – | – | |
Acetamide utilisation | – | ||
H2S | + | + | + |
Urease | – | – | – |
Tryptophan deaminase | – | – | – |
Indole | + | + | |
Acetoin | – | – | |
Gelatinase | – | – | |
Glucose fermentation | + | + | |
Glucose oxidation | + | + | |
Fermentation/oxidation of | |||
Glucose | + | ||
Mannitol | + | + | + |
Inositol | – | – | – |
Sorbitol | + | + | + |
Rhamnose | + | + | + |
Sucrose | – | – | – |
Melibiose | – | – | |
Amygdalin | – | ||
Arabinose | + | + | + |
Lactose | – | – | |
Maltose | + | + | |
Xylose | + | + | |
Raffinose | – | – | |
Adonitol | – | – | |
Dulcitol | – | ||
Salicin | – | ||
Indoxyl-β-D-glucoside metabolism | – | ||
Glucose fermentation in the presence of p-coumaric | + | ||
Esculin hydrolysis | – | ||
Polymyxin B resistance | – | ||
2,4,4′-Trichloro-2′-hydroxydiphenylether resistance | – | ||
Identification | Enterobacteriaceae | Salmonella arizonae 73% | Escherichia coli 76% |
Salmonella spp 17% | Salmonella arizonae 23% |
BMT, bone marrow transplant.