PCR-RFLP analysis of espP amplicons cleaved with AluI. Lanes: 1, AGR061 (ONT:H25), type B; 2, AGR373 (O26:H11), type B; 3, 1848 (O113:H21), type C; 4, AGR053 (O131:H25), type D; 5, AGR120 (O108:H25), type D; 6, AGR047 (O90:H8), type E; 7, AGR158 (O101:H−), type E; 8, AGR201 (O180:H−), type E; 9, 4238 (O157:H7), type A; 10, AGR609 (O9:H51), type G; 11, AGR087 (ONT:H−), type G.