HBV belongs to Hepadnaviridae with a partially doublestranded and circularDNA genome.
HBV属于嗜肝dna病毒，具有部分双链环状的DNA基因组。
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White spot syndrome virus (WSSV), a rod-shaped double-strandedcircularDNA virus, is a kind of major dangerous infectious pathogen in shrimp culture industry.