Infection of Spherical Viruses from Haliotis discus hannai Ino

The spherical virion with the size of 90~ 140 nm in diameter was detected in blood cell ma-trix of the feet, mantle and internal organization of diseased abalone. The virion was surrounded by dual unit membrane, no inclusion body. The morphology and size of virion in negative staining were the same as the observation in ultrathin sections. Identical symptom appeared in artificial in-fection experiment. The rate of death was 50%. Identical virion was observed in the dead abalone