Photobacterium marinum
# Photobacterium marinum

Photobacterium marinum is a gram-negative, oxidase and catalase positive, motile bacteria of the genus Photobacterium. Photobacterium marinum are commonly found in marine environment. S.I. Paul et al. (2021) isolated, characterized and identified Photobacterium marinum from marine sponges of the Saint Martin's Island Area of the Bay of Bengal, Bangladesh.

## Biochemical characteristics of Photobacterium marinum

Colony, morphological, physiological, and biochemical characteristics of Photobacterium marinum are shown in the Table below.

| Test type | Test | Characteristics |
| - | - | - |
| Colony characters | Size | Medium |
| Colony characters | Type | Round |
| Colony characters | Color | Creamy |
| Colony characters | Shape | Convex |
| Morphological characters | Shape | Rod |
| Physiological characters | Motility | + |
| Physiological characters | Growth at 6.5% NaCl | + |
| Biochemical characters | Gram’s staining | – |
| Biochemical characters | Oxidase | + |
| Biochemical characters | Catalase | + |
| Biochemical characters | Oxidative-Fermentative | Oxidative |
| Biochemical characters | Motility | + |
| Biochemical characters | Methyl Red | + |
| Biochemical characters | Voges-Proskauer | – |
| Biochemical characters | Indole | + |
| Biochemical characters | $H_2S$ Production | – |
| Biochemical characters | Urease | V |
| Biochemical characters | Nitrate reductase | + |
| Biochemical characters | β-Galactosidase | – |
| Hydrolysis of | Gelatin | + |
| Hydrolysis of | Aesculin | V |
| Hydrolysis of | Casein | V |
| Hydrolysis of | Tween 40 | + |
| Hydrolysis of | Tween 60 | + |
| Hydrolysis of | Tween 80 | + |
| Acid production from | Glycerol | + |
| Acid production from | Galactose | + |
| Acid production from | D-Glucose | + |
| Acid production from | D-Fructose | V |
| Acid production from | D-Mannose | – |
| Acid production from | Mannitol | V |
| Acid production from | N-Acetylglucosamine | V |
| Acid production from | Amygdalin | + |
| Acid production from | Maltose | V |
| Acid production from | D-Melibiose | + |
| Acid production from | D-Trehalose | + |
| Acid production from | Glycogen | V |
| Acid production from | D-Turanose | V |

Note: + = Positive; – =Negative; V =Variable (+/–)

