strain_id	description	flag	length
NZ_CP008805.1	Escherichia coli O157:H7 str. SS17 chromosome, complete genome	genbank	5523849
NZ_CP008806.1	Escherichia coli O157:H7 str. SS17 plasmid p0157, complete sequence	genbank	94645
NZ_CP008807.1	Escherichia coli O157:H7 str. SS17 plasmid pSS17, complete sequence	genbank	37447
