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Also known as: ''''' Cold-water vibriosis '''''—'''''Haemorrhagic syndrome '''''— ''''' Hitra disease'''''—'''''Red pest of eels '''''— ''''' Vibrio infections in fish'''''.

Also known as: ''''' Cold-water vibriosis '''''—'''''Haemorrhagic syndrome '''''— ''''' Hitra disease'''''—'''''Red pest of eels '''''— ''''' Vibrio infections in fish'''''.

==Introduction==

==Introduction==

Vibriosis is one of the most prevalent fish disease and is caused by bacteria belonging to the Vibrio genus. One of the most important strain is Vibrio anguillarum which is of major importance to salmonid fish culture industry and is also known as Red pest of eels’. V. Anguillarum has been divided into two separate biotypes of which V. anguillarumbiotype 2 has been renamed and classified as a new species Vibrio ordalii. It casues haemorrhagic septicaemia and reduced number of leucocytes.

Vibriosis is one of the '''most prevalent fish diseases''' and is caused by bacteria belonging to the genus ''Vibrio''. One of the most important strain is '''''Vibrio anguillarum''''' which is of major importance to '''salmonid fish''' culture industry and is also known as '''Red pest of eels'''. ''V. anguillarum'' has been divided into two separate biotypes of which ''V. anguillarum biotype II'' has been renamed and classified as a new species ''Vibrio ordalii''. It casues haemorrhagic septicaemia and leucopenia.

Other members of the genus Vibrio have been associated with vibriosis outbreaks in fish and shellfish (molluscs and crustacean)and these include; V.salmonicida, V.damsela,  V.vulnificus biotype II, V.tubiashii ,V. Carchariae,  V. splendidus and V. Pelagius.

Other members of the genus ''Vibrio'' have been associated with vibriosis outbreaks in fish and shellfish (molluscs and crustacean)and these include; ''V.salmonicida'', ''V.damsela'',  ''V.vulnificus biotype II'', ''V.tubiashii'' ,''V. carchariae'',  ''V. splendidus'' and ''V. pelagius''.

==Signalment==

==Signalment==

Vibrio anguillarum is found in cultured and wild marine fish in shallow salt or brackish water during late summer. The pathogen was thought to be spread by contact with scavenging wild fish feeding around the farms but V. anguillarum, has been found in the food of cultured and wild healthy fish (Frerichs and Roberts, 1989). Frerichs GN, Roberts RJ, 1989. The bacteriology of teleosts. In: Roberts RJ, ed. Fish Pathology. London: Baillière Tindall, 289-319.

''Vibrio anguillarum'' is found in '''cultured and wild marine fish''' in shallow salt or brackish water during late summer. The pathogen was thought to be spread by contact with scavenging wild fish feeding around the farms but '''''V. anguillarum''''', has been '''found in the food of cultured and wild healthy fish''' (Frerichs and Roberts, 1989). Frerichs GN, Roberts RJ, 1989. The bacteriology of teleosts. In: Roberts RJ, ed. Fish Pathology. London: Baillière Tindall, 289-319.

It affects cultured fish and outbreaks have been seen in Pacific and Atlantic salmon, Trout, Turbot, Striped bass, Winter flounder, Cod, Red sea-bream, European and Japanese eel, Saithe (Pollachius Virens), Gilthead sea-bream, Sea mullet, Seriola, Channel catfish, Milkfish http://en.wikipedia.org/wiki/Milkfish , Ayu http://en.wikipedia.org/wiki/Ayu  , and Tilapia  http://en.wikipedia.org/wiki/Tilapia .

It affects cultured fish and outbreaks have been seen in Pacific and Atlantic salmon, Trout, Turbot, Striped bass, Winter flounder, Cod, Red sea-bream, European and Japanese eel, Saithe (Pollachius Virens), Gilthead sea-bream, Sea mullet, Seriola, Channel catfish, Milkfish http://en.wikipedia.org/wiki/Milkfish , Ayu http://en.wikipedia.org/wiki/Ayu  , and Tilapia  http://en.wikipedia.org/wiki/Tilapia .

It can also affect molluscs and crustacean including European and Japanese oyster, Clam, Lobster and shrimp.

It can also affect molluscs and crustacean including European and Japanese oyster, Clam, Lobster and shrimp.