Table 6. Prevalence of V. parahaemolyticus genetic markers.
| Site | Month | tlh OY, W | tdh OY, W | trh OY, W | tdh/trh OY, W | toxR OY, W | vpm OY, W |
|---|---|---|---|---|---|---|---|
| BB | June | 13, 2 | 1, 0 | 5, 1 | 2, 0 | 12, 0 | 11, 0 |
| July | 20, 14 | 2, 2 | 3, 1 | 1, 0 | 14, 4 | 20, 7 | |
| August | 14, 4 | 0, 0 | 1, 0 | 0, 0 | 14, 1 | 12, 0 | |
| September | 7, ND | 0, ND | 0, ND | 0, ND | 6, ND | 6, ND | |
| October | 1, 0 | 0, 0 | 0, 0 | 0, 0 | 1, 0 | 0, 0 | |
| LW | June | 8, 0 | 1, 0 | 0, 0 | 0, 0 | 8, 0 | 7, 0 |
| July | 31, 5 | 1, 0 | 3, 1 | 21, 0 | 29, 3 | 31, 3 | |
| August | 7, 4 | 0, 0 | 0, 0 | 0, 0 | 7, 2 | 7, 2 | |
| September | ND, 0 | ND, 0 | ND, 0 | ND, 0 | ND, 0 | ND, 0 | |
| October | ND, ND | ND, ND | ND, ND | ND, ND | ND, ND | ND, ND | |
| SL | August | 3, 3 | 0, 0 | 0, 0 | 0, 0 | 3, 3 | 2, 2 |
| September | 1, 0 | 0, 0 | 0, 0 | 0, 0 | 1, 0 | 0, 0 | |
| October | ND, ND | ND, ND | ND, ND | ND, ND | ND, ND | ND, ND | |
| Total | 105, 32 | 5, 2 | 12, 3 | 24, 0 | 95, 13 | 96, 14 | |
ND: Not detectable; OY: Oyster; W: Water; BB: Bowers Beach; LW: Lewes, Broadkill; SL: Slaughter Beach.