“…The disease is a potential threat for food security, especially in China where more than 2.5 M metric tons of crucian carp and Prussian carp are produced (FAO, ). The virus seems to be widely distributed in the world, and it was detected in Japan (Jung & Miyazaki, ), USA (Goodwin, Sadler, Merry, & Marecaux, ), China (Luo et al., ), Australia (Stephens, Raidal, & Jones, ) and recently in several European countries including the UK (Jeffery et al., ), France (Boitard et al., ), Switzerland (Giovannini et al., ) and Italy (Fichi et al., ). More critical for attempts to limit the spreading of the disease is the observation that surviving individuals become chronic carriers of a most probably latent infection without displaying external clinical signs (Wang, Xu, & Lu, ).…”