In addition to temperature controls, harvest practices can
also influence levels of V. parahaemolyticus in oysters
harvested with the intertidal practice. In the intertidal
harvest, oysters are exposed to ambient air, which allows
V. parahaemolyticus to multiply rapidly in oysters especially
on warm and sunny days. Nordstrom et al. (2004)
investigated effect of low-tide exposure of oysters to ambient
conditions on V. parahaemolyticus levels in oysters and
found that the mean densities of V. parahaemolyticus in
oysters were four to eight times greater after maximum
exposure than at the corresponding initial exposure.