streptomyces phage φ0 streptomyces phage φ0 streptomyces phage φ0 is a bacteriophage that infects streptomyces. it was discovered in 2016. the bacteriophage contains a double-stranded rna genome and probably belongs to the cystoviridae family. streptomyces phage φ0 virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: duplornaviricota class: vidaverviricetes order: mindivirales family: cystoviridae (?) virus: streptomyces phage φ0