Spring viraemia of Carp (SVC) is often a fatal haemorrhagic disease of common carp. It is caused by a rhabdovirus
Clinical signs of disease
- exophthalmus (pop eye)
- swollen abdomen (dropsy)
- petechial (pinpoint): haemorrhages in the fatty tissue and muscle surrounding organs and stomach wall
- haemorrhages on skin , gills,swim bladder
- isolation or direct immunofluorescence or ELISA
- Virus neutralisation
- Necropsy of infected fish reveals :-
- splenomegaly with reticuloendothelial hyperplasia and enlarged melanomacrophage centres.
- The liver is hyperaemic with multifocal necrosis and degeneration.
- Kidney tubules are often clogged with casts
There is no treatment once infected.