TABLE 6.
Origins and properties of STEC strains from food belonging to the most important serotypes
| Serotype(s) (no. of strains) | Stx2 family gene(s) (no. of strains) | Other virulence gene(s) (no. of strains) | Sourcesa (no. of strains) |
|---|---|---|---|
| O8:H19 (3), O8:H21 (1) | stx2 (2), stx2 + stx2d (1), stx2e (1) | hlyA (3) | B (1), B/P (1), P (1), W (1) |
| O8:H4 (3), O8:H9 (11) | stx2e (14) | None | B (1), B/P (6), M (1), P (6) |
| O21:H21 (9) | stx2-O118 (9) | hlyA (2) | B (3), M (1), W (5) |
| O22:[H8] (9) | stx2d (9) | stx1 (8), hlyA (9) | B (4), B/P (2), M (1), P (1), W (1) |
| O91:[H14] (6) | stx2-O118 (2) | stx1 (6), hlyA (2) | B (1), B/P (2), L (1), P (2) |
| O91:[H21] (8) | stx2 + stx2d (6), stx2(2) | stx1 (6), hlyA (7) | B (1), B/P (1), M (2), P (2), W (2) |
| O100:[H30] (8) | stx2e | None | B (2), B/P (3), M (1), P (2) |
| O113:H21 (9) | stx2 (1), stx2d (4), stx2 + stx2d(4) | stx1 (1), hlyA (7) | B (3), B/P (1), P (3), W (2) |
| O146:H21 (4), O146:H28 (5) | stx2 + stx2-O118 (1), stx2-O118 (8) | stx1c (2), hlyA (3) | B (1), W (8) |
| O174:H2 (3) | stx2 (1), stx2d (2) | stx1 (3), hlyA (3) | B (2), M (1) |
| O174:H21 (5), O174:[H8] (2) | stx2 (5), stx2-O118 (2) | stx1c (2), hlyA (3) | B (4), W (3) |
| O178:H19 (4) | stx2 (4) | stx1 (2), hlyA (3) | B (3), L (1) |
| O179:H8 (4) | stx2 (4) | hlyA (4) | B (2), W (2) |
a
B, beef; W, wildlife meat; L, lamb; P, pork; B/P, mixed beef/pork meat; M, milk.