Vibrio alginolyticus is a Gram-negative marine bacterium.[1][2] It is medically important since it causes otitis and wound infection.[1] It is also present in the bodies of animals such as pufferfish, where it is responsible for the production of the potent neurotoxin, tetrodotoxin.[3]
Vibrio alginolyticus are commonly found in aquatic environments. Some strains of V. alginolyticus are highly salt tolerant and commonly found in marine environment. S.I. Paul et al. (2021)[2] isolated and identified many strains of Vibrio alginolyticus from nine marine sponges of the Saint Martin's Island Area of the Bay of Bengal, Bangladesh.
V. alginolyticus was first identified as a pathogen of humans in 1973. It occasionally causes eye, ear, and wound infections. It is a highly salt-tolerant species and can grow in salt concentrations of 10%. Most clinical isolates come from superinfected wounds that become contaminated at the beach. Tetracycline is typically an effective treatment. V. alginolyticus is rare cause of bacteremia in immunocompromised hosts.[4]
Biochemical characteristics of V. alginolyticus
Colony, morphological, physiological, and biochemical characteristics of Vibrio alginolyticus are shown in the Table below.[2]
| Test type | Test | Characteristics |
| Colony characters | Size | Medium |
| Type | Round | |
| Color | Whitish | |
| Shape | Convex | |
| Morphological characters | Shape | Vibrio |
| Physiological characters | Motility | + |
| Growth at 6.5% NaCl | + | |
| Biochemical characters | Gram's staining | – |
| Oxidase | + | |
| Catalase | + | |
| Oxidative-Fermentative | Fermentative | |
| Motility | + | |
| Methyl Red | + | |
| Voges-Proskauer | + | |
| Indole | – | |
| H2S Production | – | |
| Urease | – | |
| Nitrate reductase | – | |
| β-Galactosidase | + | |
| Hydrolysis of | Gelatin | + |
| Aesculin | – | |
| Casein | – | |
| Tween 40 | + | |
| Tween 60 | + | |
| Tween 80 | + | |
| Acid production from | Glycerol | + |
| Galactose | – | |
| D-Glucose | + | |
| D-Fructose | + | |
| D-Mannose | + | |
| Mannitol | + | |
| N-Acetylglucosamine | + | |
| Amygdalin | + | |
| Maltose | + | |
| D-Melibiose | – | |
| D-Trehalose | + | |
| Glycogen | + | |
| D-Turanose | + |
Note: + = Positive, – =Negative
References
- ^ a b Reilly, G D; Reilly, C A; Smith, E G; Baker-Austin, C (2011). "Vibrio alginolyticus-associated wound infection acquired in British waters, Guernsey, July 2011" (PDF). Euro Surveill. 16 (42). doi:10.2807/ese.16.42.19994-en. PMID 22027377.
- ^ a b c Paul, Sulav Indra; Rahman, Md. Mahbubur; Salam, Mohammad Abdus; Khan, Md. Arifur Rahman; Islam, Md. Tofazzal (2021-12-15). "Identification of marine sponge-associated bacteria of the Saint Martin's island of the Bay of Bengal emphasizing on the prevention of motile Aeromonas septicemia in Labeo rohita". Aquaculture. 545: 737156. doi:10.1016/j.aquaculture.2021.737156. ISSN 0044-8486.
- ^ Noguchi, T; Hwang, D F; Arakawa, O; Sugita, H; Deguchi, Y; Shida, Y; Hashimoto, K (1987). "Vibrio alginolyticus, a tetrodotoxin-producing bacterium, in the intestines of the fish Fugu vermicularis vermicularis". Marine Biology. 94 (4): 625–630. doi:10.1007/BF00431409. S2CID 84437298.
- ^ Longo, Dan, et al. Harrison's Principles of Internal Medicine 18th edition. McGraw-Hill Professional, 2011.
External links