The following E coli IS elements could not be confidently clipped out: IS1#ARTEFACT in chr6frag-179: 5514 - 5599 The following E coli IS elements could not be confidently clipped out: IS10#ARTEFACT in chrUnfrag-741: 36693 - 36796 IS10#ARTEFACT in chrUnfrag-741: 37587 - 37709