FEATURED ARTICLE QUIZ #2 Assessment of Shellfish Practices in Licensed Retail Food Establishments in Response to Increased Vibrio Illnesses in a Landlocked Area Available to NEHA members only, the JEH Quiz, offered six times per calendar year through the Journal of Environmental Health, is a convenient tool for self-assessment and an easily accessible means to accumulate continuing-educatlon (CE) credits toward maintaining your NEHA credentials. 1. Which of the following is NOT a post-harvest processing (PHP) method that can reduce the number of bacteria In raw oysters? a High hydrostatic pressure. b. Low temperature pasteurization. c. Vacuum-packed storage. d. Individual quick freezing. 3.