The Caudovirales are an order of viruses also known as the tailed bacteriophages (cauda is Latin for "tail").
The Enterobacteria phage P22 is a bacteriophage that infects Salmonella typhimurium.
The International Committee on Taxonomy of Viruses (ICTV) authorizes and organizes the taxonomic classification of and the nomenclatures for viruses.
Podoviridae is a family of viruses in the order Caudovirales.
Some viruses (e.g. HIV and many animal viruses) have viral envelopes covering their protective protein capsids.
A virus is a small infectious agent that replicates only inside the living cells of other organisms.