| characterization of the escherichia coli o157:h7 outbreak strain whose shiga toxin 2 gene is inactivated by is1203v insertion. | a total of 12 enterohemorrhagic escherichia coli (ehec) o157:h7 strains were isolated during a recent outbreak in a nursery school in ehime prefecture, japan. these isolates were considered to be derived from a common strain when analyzed using an is-printing method and pulsed-field gel electrophoresis. pcr analysis revealed that the isolates harbor stx1, stx2, eae, and hlya. however, assessment of the production of the stx proteins revealed that these isolates produced stx1 but not stx2. we det ... | 2013 | 23698480 |