Table 1.
Phenotypic characteristics of Chromobacterium sp. isolates.
| Biochemical Characteristics | Percentage of positive bacterial isolates | |||
| Geographic Regions | ||||
| Type strain | ERF (11)* | AF (6) | BS (26) | |
| β-galactosidase (ONPG) | - | 0 | 0 | 19 |
| Arginine dihydrolase (ADH) | + | 91 | 100 | 50 |
| Lysine decarboxylase (LDC) | - | 0 | 0 | 15 |
| Ornithine decarboxylase (ODC) | - | 0 | 0 | 12 |
| Citrate (CIT) | - | 0 | 0 | 46 |
| H2S production (H2S) | - | 0 | 0 | 0 |
| Urease (URE) | - | 0 | 0 | 19 |
| Tryptophanane deaminase (TDA) | - | 0 | 0 | 0 |
| Indole production (IND) | - | 64 | 100 | 8 |
| Acetoin production (VP) | - | 36 | 100 | 69 |
| Gelatinase (GEL) | + | 100 | 83 | 73 |
| Fermentation/oxidation: | ||||
| Glucose (GLU) | - | 9 | 100 | 19 |
| Mannitol (MAN) | - | 0 | 0 | 19 |
| Inositol (INO) | - | 0 | 0 | 4 |
| Sorbitol (SOR) | - | 0 | 0 | 19 |
| Rhamnose (RHA) | - | 0 | 0 | 8 |
| Sucrose (SAC) | - | 9 | 0 | 12 |
| Melibiose (MEL) | - | 0 | 0 | 15 |
| Amygdalin (AMY) | - | 0 | 0 | 15 |
| Arabinose (ARA) | - | 0 | 0 | 8 |
| Motility (MOT) | + | 100 | 83 | 81 |
| MacConkey (McC) | + | 82 | 83 | 85 |
* number of isolates; + positive; - negative.