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Hainan Province, which was dotted occurred, indicating the occurrence of streptococcal disease in the extended season, also means streptococcus may be widespread in 2010. | April 2010 tilapia streptococcus disease in Hainan Province which was dotted occurred indicating the occurrence of streptococcal disease in the extended season also means streptococcus may be widespread in 2010. Text Figure Freshwater Fisheries Research Institute of Fujian Province Hai-Ping Fan 1 Streptococcus Overview Worldwide death of fish caused by streptococcal infection in the twentieth century has been sporadic seventies and eighties reported nineties the rise now has become a major streptococcal pathogens of fish. Primary infection of Streptococcus fish head fish brain damage then damage the blood circulation through the liver kidney spleen and other organs caused systemic hemorrhage is a bacterial disease contagious high mortality treatment difficulties and the higher the temperature the more severe disease. Streptococcus cultured species have a certain selectivity occur mainly in salmonids tilapia catfish carp and freshwater pomfret and grass carp carp silver carp and bighead carp have not been reported. Streptococcus infection reported in literature tilapia strains are mainly dolphins Streptococcus S.iniae and Streptococcus agalactiae S.agalaciate the domestic strains of Streptococcus isolated from Streptococcus mostly dolphins Fujian Institute of Freshwater Fisheries S. agalactiae was first reported outbreak of deaths caused by tilapia. Robinson and Meyer in 1966 first reported in U.S. freshwater fish golden bream Notemigonus crysoleucas an isolated group B Streptococcus. Subsequently Plumb and Baya isolated from fish such as multiple strains of non-hemolytic streptococcus group B but not sure is right. 1994 Eldar etc. to be called Streptococcus difficile. Wilkinson Elliott and Vandamme etc. to isolation and identification of streptococci mostly assigned to group B Streptococcus agalactiae. 2002 Evans and other re-reported hemolytic Streptococcus agalactiae is the major pathogen of fish. In 2005 Kawamura and other proposed re-division of S difficilis .
