3/13/2016 Levels of total vibrios during 10 days of Raw oysters are consumed for storage at5°c,10°c,and20°c their taste old wives'tale-they act as an aphrodisiac 8 oysters contain hormone-inducing amino acids People rarely consider the hazards associated with eating raw oysters 10 Stoaage Time (days) +5PC量1护C2PC Outbreak Vibrios July-August,1997 .209 persons became ill with gastroenteritis after eating raw oysters Over 20 Vibrio species are described dmrcpsu. 12 cause disease in humans 8 are directly associated with food Culture confirmed V.parahaemolyticus Seafood consumption is strongly outbreak correlated with vibrio infections -<200 CFU per gram of oyster meat illness may occur at bacterial levels lower Vibrios are the dominate species in the than the current action level estuarine waters and are associated US and Canada permit the sale of oysters with with a variety of seafood <10 CFU per gram of oyster meat 3/13/2016 2 Levels of total vibrios during 10 days of storage at 5°C, 10°C, and 20°C • Raw oysters are consumed for - their taste - old wives’ tale - they act as an aphrodisiac - oysters contain hormone-inducing amino acids • People rarely consider the hazards associated with eating raw oysters Outbreak July - August, 1997 • 209 persons became ill with gastroenteritis after eating raw oysters • Symptoms: diarrhea, abdominal cramps, nausea, and vomiting • Culture confirmed V. parahaemolyticus outbreak - < 200 CFU per gram of oyster meat - illness may occur at bacterial levels lower than the current action level • US and Canada permit the sale of oysters with < 104 CFU per gram of oyster meat Vibrios • Over 20 Vibrio species are described • 12 cause disease in humans • 8 are directly associated with food • Seafood consumption is strongly correlated with vibrio infections • Vib i h d i i i h Vib rios are t h e dominate species i n t h e estuarine waters and are associated with a variety of seafood