Prevalence and characteristics of Cyprinid herpesvirus 3 (CyHV-3) infection in common carp (Cyprinus carpio L.) inhabiting three rivers in Kochi Prefecture, Japan.

Cyprinid herpesvirus 3 (CyHV-3) causes lethal disease in common and koi carp. Mortality by CyHV-3 disease has not been reported since 2011 in Kochi Prefecture, Japan. Here, we detected and quantified CyHV-3 in common carp inhabiting three rivers in the prefecture to examine if the carp are carriers of CyHV-3 as a source of infection.