Finally, the analysis on the Mytilus and Tapes batches (n = 18) collected before and after commercial purification treatment, showed an increase in V. parahaemolyticus levels (from 1.1 × 102 to 4.8 × 102 CFU/g for Mytilus and from 9.5 × 101 to 7.1 × 102 CFU/g for Tapes).