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Absence of TAI from E. coli strains closely related to E. coli O157:H7. Hybridization of the TAI probe to BstXI-digested DNA from E. coli O157:H7 (lane 1); E. coli HB101 (lane 2); E. coli O55:H7 strains 5A, 5B, 5C, 5D, 5E, TB156A, and TB182A (lanes 3 to 9, respectively); and E. coli O157:H− strains 493-89, 5412-89, CB569, and 514-91 (lanes 10 to 13, respectively) is shown. The arrows indicate fragments detected when membrane is probed with cloned iha.
