Vibrio anguillarum is a Gram-negative commashaped bacterium with polar flagella that is a member of the family Vibrionaceae. It is the cause of vibriosis or haemorrhagic septicaemic disease in wild and cultured marine and freshwater fish (Actis, Tolmasky & Crosa 1999; Austin & Austin 1999). Chemotherapeutic agents, including quinolones, have been widely used for the treatment of vibriosis in cu...

Phaeobacter gallaeciensis can antagonize fish-pathogenic bacteria in vitro, and the purpose of this study was to evaluate the organism as a probiont for marine fish larvae and their feed cultures. An in vivo mechanism of action of the antagonistic probiotic bacterium is suggested using a non-antagonistic mutant. P. gallaeciensis was readily established in axenic cultures of the two microalgae T...

In Scotland, low level mortalities in farmed Atlantic salmon were associated with a bacterium which had properties generally associated wlth the genus Vibno, but which did not resemble any previously described species. In naturally infected fish extensive sloughing and necrosis of the gut mucosa, haemorrhaging, and an increase in perltoneal exudate were recorded. Similar lesions were produced i...