A species of temperate bacteriophage in the genus P1-like viruses, family MYOVIRIDAE, which infects E. coli. It is the largest of the COLIPHAGES and consists of double-stranded DNA, terminally redundant, and circularly permuted.

Synonyms: txid10678, Coliphage P1, Enterobacteria phage P1, P1 Phages, Phages, P1, P1 Phage, Bacteriophage P1, Phage P1, Phage, P1