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[Survey of residual antibiotic agents in cultured fish and shellfish].

A survey of residual antibiotic agents in cultured fish and shellfish purchased from the Tokyo Central Market was carried out. Out of 240 samples tested, OTC was detected in 14 samples which consisted of flatfish, yellowtail, seriola and eel. Synthetic antibiotic agents were not detected. The highest level of OTC was 0.36 microgram/g in skin of flatfish. In the case of flatfish, the concentration of OTC was highest in skin, followed by liver, then muscle. OTC was detected in livers of all yellowtail, seriola and eel, and the concentration was higher than that in muscle or skin.