Research Triangle Institute (RTI) conducted a study for the Food and Drug Administration (FDA) to estimate the costs of a seasonal harvesting restriction on Gulf of Mexico oysters and a seasonal marketing restriction on the sale of Gulf Oysters for raw consumption. During the course of this study, the 1995 Interstate Shellfish Sanitation Conference (ISSC) adopted a Vibrio vulnificus interim control plan for oysters. Therefore, the RTI study includes an estimate of the costs of complying with the ISSC interim control plan.