Cyprinid Herpesvirus 2 (CyHV-2) is an emerging pathogen which can cause
huge economic losses in fish farming worldwide. This study describes a disease
outbreak in crucian carp (Carassius carassius), reporting for the first time a CyHV-2
infection in Piedmont (Italy), since it has never been described in this area. Our
findings also highlighted that both Aeromonas hydrophila and Aeromonas sobria have
been isolated in association with CyHV-2; we have speculated that motile Aeromonas
spp. and CyHV-2 could be regarded as a potential “infectious pathogenic-complex”.
However, this evidence-based hypothesis must be corroborated by further studies and
investigations. In our opinion, it is very important, through experimental studies and
case report, to determine the impact of CyHV-2 on Carassius carassius, in order to
establish proper commercial regulation and biosecurity measures to prevent the
introduction and widespread of diseases.
Keywords: Aeromonas spp., CyHV-2, Crucian carp.
