Abstract
A novel virulent phage named JL1 against Escherichia coli O157:H7 was isolated from raw sewage. It was found that JL1 has an icosahedral head and a long flexible non-contractile tail. The complete genome of JL1 is composed of a linear double-stranded DNA of 43,457 base pairs in length, with 54.77 % G+C content and 60 putative open reading frames. Morphology and bioinformatics analysis revealed that phage JL1 is a member of the family Siphoviridae of the order Caudovirales. It is different from previously reported phages of E. coli O157:H7 but is homologous to Sodalis phage SO-1, Shigella phage EP23, Escherichia phage HK578 and Escherichia phage SSL-2009a.
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