Unusually high intake and fecal output of cadmium, and fecal output of other trace elements in New Zealand adults consuming dredge oysters

摘要: The concentration of cadmium in the New Zealand dredge oyster Tiostrea lutaria (commonly known as a Bluff oyster) is sufficiently high so that ingestion just one can more than double normal daily dietary intake for adult. A survey 75 adults (18–76 years old) associated with fishing industry Bluff, Southland, Zealand, was carried out before and at end season. Preseason intakes (from history questionnaires from 3-day fecal collections) cadmium, selenium, zinc, copper, managanese were adult not consuming oysters. subjects classified according to their reported average consumption during 6 months season; who consumed oysters likely smoke cigarettes. end-season output confirmed intakes: Category I (0–5 oysters/week): 15 ± 8 (mean SD) μg Cd/day; II (6–23 84 134 III (24–71 129 144 IV (72 + 233 185 Cd/day. selenium well increased by many but outputs manganese not. Using excretion predict intake, 8–15% this study identified having an which has been prevalence tubular proteinuria. highest individual season 580 Cd/day, i.e., equivalent 10 times above weekly provisionally considered tolerable (400–500 Cd/week; WHO, 1972). Continued investigations on population group will determine whether there are any health consequences these extremely intakes.