Table 5 Results of distribution of the stx₁, stx₂, and their subtypes gene combinations in STEC strains

stx₁, stx_1d, stx₂, stx_2e

O146:H21 (1), O1:H7 (1), O127:H6 (1), O78 (4), O91:H21 (3), O2:H6 (5), O128:H2 (1), O86 (1), O17:H18 (3), O7:H2 (3), O8:H21 (5), O121:H7 (1), O55:H7 (1), O75 (1)

31/60 (51.7%)

stx₁, stx_1d, stx₂

O1:H7 (1), O26:H11 (1), O55:H7 (1), O127:H6 (1), O15:H2 (3), O111:H2 (1)

8/60 (13.3%)

stx₁, stx_1d, stx_2e

O78 (2), O111:H2 (1), O17:H18 (1), O128:H2 (1)

5/60 (8.3%)

stx₁, stx_1d, stx₂, stx_2c, stx_2e

O153:H2 (1)

1/60 (1.7%)

stx₁, stx_1d

O26:H11 (1), O15:H2 (3), O128:H2 (1)

5/60 (8.3%)

stx₁, stx₂, stx_2c

O91:H21(1)

1/60 (1.7%)

stx₁, stx₂, stx_2e

O17:H18 (1), O91:H21(1), O26:H11(1)

3/60 (5%)

stx₁, stx₂

O83 (1), O125:H21(1), O15:H2 (2)

4/60 (6.7%)

stx₁, stx_2e

O17:H18 (1)

1/60 (1.7%)

stx₁, stx_1d, stx_2c, stx_2e

O124 (1)

1/60 (1.7%)