| Characteristics | Klebsiella pneumoniae |
| Capsule | +ve |
| Catalase | +ve |
| Citrate | +ve |
| Flagella | -ve |
| Gas | +ve |
| Gelatin Hydrolysis | -ve |
| Gram Staining | -ve |
| Growth in KCN | +ve |
| H2S | -ve |
| Indole | -ve |
| Motility | -ve |
| MR (Methyl Red) | -ve |
| MUG Test | +ve |
| Nitrate Reduction | +ve |
| OF (Oxidative-Fermentative) | Fermentative |
| Oxidase | -ve |
| Pigment | -ve |
| Shape | Rod |
| Spore | -ve |
| TSIA (Triple Sugar Iron Agar) | A/A |
| Urease | +ve |
| VP (Voges Proskauer) | +ve |
| Adonitol | +ve |
| Arabinose | +ve |
| Arabitol | +ve |
| Cellobiose | +ve |
| DNase | -ve |
| Erythritol | -ve |
| Esculin Hydrolysis | +ve |
| Glucose | +ve |
| Glycerol | +ve |
| Inositol | +ve |
| Lactose | +ve |
| Maltose | +ve |
| Mannitol | +ve |
| Mannose | +ve |
| Melibiose | +ve |
| Mucate | +ve |
| MyoInositol | +ve |
| Raffinose | +ve |
| Rhamnose | +ve |
| Salicin | +ve |
| Sorbitol | +ve |
| Sucrose | +ve |
| Tartrate | +ve |
| Trehalose | +ve |
| Xylose | +ve |
| Acetoin Production | Variable |
| Arginine Dehydrolase | -ve |
| Esculin Hydrolysis | +ve |
| Lipase | -ve |
| Lysine | +ve |
| ONPG (β-galactosidase) | +ve |
| Ornithine Decarboxylase | -ve |
| Phenylalanine Deaminase | -ve |
| Tryptophan Deaminase | -ve |
| Tyrosine Hydrolysis | -ve |