Mudadu Alessandro G, Bazzoni Anna Maria, Bazzardi Riccardo, Lorenzoni Giuseppa, Soro Barbara, Bardino Nadia, Arras Igor, Sanna Giovanna, Vodret Bruna, Virgilio Sebastiano
Veterinary Public Health Institute of Sardinia, Sassari.
Regional Environmental Protection Agency of Sardinia, Sassari, Italy.
Ital J Food Saf. 2021 Mar 25;10(1):8947. doi: 10.4081/ijfs.2021.8947. eCollection 2021 Mar 11.
In Sardinia (Italy), bivalve molluscs production plays an important role in the trade balance. Diarrhoetic shellfish poisoning (DSP), an intoxication caused by the ingestion of bivalve molluscs that have accumulated high levels of Okadaic acid (OA), may represent a serious risk for the public health and a remarkable economic loss for the producers. Aim of this work was to improve knowledge about the repeatability of OA accumulation phenomena in various seasons trying to understand whether or not there was a trend. Also, the interaction between toxic algae and OA accumulation was examined. In this study, data of lipophilic toxins, water temperature and abundance of DSP-producing microalgal species were collected in a four-year period (2015-2018) in coastal production areas of Sardinia. Several episodes of OA positive values (>160 eq μgAO/Kg pe, Reg 853/04) were recorded during the study period in different production areas of Sardinia and in different seasons. A seasonal repeatability of OA accumulation in molluscs was observed in some production areas; moreover, different temporal gaps between the presence of toxic algae and OA accumulation were reported. Toxicity was observed almost exclusively in Lamark (99%), being this matrix the most abundant species bred in Sardinia.
在意大利撒丁岛，双壳贝类软体动物的生产在贸易平衡中发挥着重要作用。腹泻性贝类中毒（DSP）是一种因摄入积累了高含量冈田酸（OA）的双壳贝类软体动物而导致的中毒，可能对公众健康构成严重风险，并给生产者带来巨大经济损失。这项工作的目的是增进对不同季节OA积累现象重复性的了解，试图弄清楚是否存在某种趋势。此外，还研究了有毒藻类与OA积累之间的相互作用。在本研究中，在撒丁岛沿海生产区的四年期间（2015 - 2018年）收集了亲脂性毒素、水温以及产DSP微藻物种丰度的数据。在研究期间，撒丁岛不同生产区和不同季节记录到了多次OA阳性值事件（>160 eq μgAO/Kg pe，Reg 853/04）。在一些生产区观察到了软体动物中OA积累的季节性重复性；此外，还报告了有毒藻类出现与OA积累之间不同的时间间隔。几乎仅在拉马克（99%）观察到毒性，该品种是撒丁岛养殖数量最多的品种。
