충남도내 유통 패류의 설사성 패류독소 오염 실태 조사

Monitoring of Diarrhetic Shellfish Poisoning Toxins in Bivalves from Local Seafood Markets in Chungcheongnam-do

Background: Diarrhetic shellfish poisoning (DSP) is caused by ingestion of bivalves contaminated with diarrhetic shellfish toxins (DSTs), including okadaic acid (OA) and dinophysistoxins (DTXs). These toxins are produced by harmful dinoflagellates and can accumulate in filter-feeding shellfish, posing health risks to consumers. Therefore, monitoring of DSTs is essential to ensure seafood safety. Methods: Between February 2021 and September 2022, 108 samples of oysters, mussels, clams, and scallops were collected from seafood markets across Chungcheongnam-do, Korea. Quantitative analysis of DSTs was conducted using liquid chromatography-electrospray ionization mass spectrometry (LC-MS/MS). Two major DSP toxins, OA and DTXs, were targeted. Results: Among all samples, OA was detected in one scallop sample (0.9 %) at a concentration of 0.006 µg/g, which was well below the Korean regulatory limit of 0.16 mg/kg. No DTXs were detected in any of the analyzed samples. Overall, the contamination levels of DSTs in the tested bivalves were minimal, and no sample exceeded the regulatory limit. Conclusion: The finding indicate that bivalves distributed in seafood markets across Chungcheongnam-do are generally considered safe from DST contamination. However, even at low levels, the detection of OA highlights the need for continuous and systematic monitoring to prevent potential health risks.