Spring viremia of carp (SVC) is a contagious viral disease mainly seen in farmed carp and related species. Outbreaks can cause substantial economic losses. SVC can be highly fatal in young fish, with mortality rates up to 90%. In Europe, where this disease has been endemic for at least fifty years, 10-15% of one-year-old carp are lost to SVC each year. The causative virus can be spread by fomites and parasitic invertebrates, and is difficult to eradicate; once it is established in a pond, elimination of the virus may require the destruction of all aquatic life. Since 2002, several SVC outbreaks have been reported in U.S., with both cultivated and wild species affected.