strain_id	description	flag	length
NZ_CP038313.1	Escherichia coli O157:H7 strain OK1 chromosome, complete genome	genbank	5459741
NZ_CP038314.1	Escherichia coli O157:H7 strain OK1 plasmid pOK1-1, complete sequence	genbank	97630
NZ_CP038315.1	Escherichia coli O157:H7 strain OK1 plasmid pOK1-2, complete sequence	genbank	3306
