TABLE 1.
Components and interpretation of the RapID CB Plus panel tests
| Test or substrate | Positive reaction | Negative reaction |
|---|---|---|
| Carbohydrate utilization tests | ||
| Glu (glucose) | Yellow, gold, or light yellow-orange | Red, dark orange, or orange |
| Suc (sucrose) | ||
| Rib (ribose) | ||
| Mal (maltose) | ||
| Substrates for glycosidase tests | ||
| α-GLU (p-nitrophenyl-α-d-glucoside) | Yellow | Clear, tan, or very pale yellow |
| β-GLU (p-nitrophenyl-β-d-glucoside) | ||
| NAG (p-nitrophenyl-N-acetyl-β-d-glucosaminide) | ||
| GLY1 (p-nitrophenylglycoside) | ||
| ONPG (o-nitrophenyl-β-d-galactopyranoside) | ||
| Substrates for aminopeptidases | ||
| PRO (proline-β-naphthylamide) | ||
| TRY (tryptophan-β-naphthylamide) | ||
| PYR (pyrrolidine-β-naphthylamine) | Purple, red, or very dark purple | Yellow, light orange, or very light pink |
| LGLY (leucyl-glycine-β-naphthylamide) | ||
| LEU (leucine-β-naphthylamide) | ||
| Single-enzyme tests | ||
| URE (urease) | Red or dark red-orange | Yellow or orange |
| NIT (nitrate reductase) | Red or pink | Clear |
| PHSa (phosphatase) | Yellow | Clear, tan, or very pale yellow |
| LIP (lipase) | Yellow or yellow-orange | Red or orange |
a
PHS is also a p-nitrophenyl test.