Roué Mélanie auteur aut IRD Smith K.F. auteur aut IRD Sibat M. auteur aut IRD Viallon J. auteur aut IRD Henry K. auteur aut IRD Ung A. auteur aut IRD Biessy L. auteur aut IRD Hess P. auteur aut IRD Darius H.T. auteur aut IRD Chinain M. auteur aut IRD text journalArticle eng text/pdf reformatted digital access Ciguatera poisoning is a foodborne illness caused by the consumption of seafood contaminated with ciguatoxins (CTXs) produced by dinoflagellates from the genera Gambierdiscus and Fukuyoa. The suitability of Solid Phase Adsorption Toxin Tracking (SPATT) technology for the monitoring of dissolved CTXs in the marine environment has recently been demonstrated. To refine the use of this passive monitoring tool in ciguateric areas, the effects of deployment time and sampler format on the adsorption of CTXs by HP20 resin were assessed in Anaho Bay (Nuku Hiva Island, French Polynesia), a well-known ciguatera hotspot. Toxicity data assessed by means of the mouse neuroblastoma cell-based assay (CBA-N2a) showed that a 24 h deployment of 2.5 g of resin allowed concentrating quantifiable amounts of CTXs on SPATT samplers. The CTX levels varied with increasing deployment time, resin load, and surface area. In addition to CTXs, okadaic acid (OA) and dinophysistoxin-1 (DTX1) were also detected in SPATT extracts using liquid chromatographycoupled to tandem mass spectrometry (LC-MS/MS), consistent with the presence of Gambierdiscus and Prorocentrum species in the environment, as assessed by quantitative polymerase chain reaction (qPCR) and high-throughput sequencing (HTS) metabarcoding analyses conducted on passive window screen (WS) artificial substrate samples. Although these preliminary findings await further confirmation in follow-up studies, they highlight the usefulness of SPATT samplers in the routine surveillance of CPrisk on a temporal scale, and the monitoring of other phycotoxin-related risks in ciguatera-prone areas. specialized POLYNESIE FRANCAISE PACIFIQUE 035 054 050 034 12 5 art. 321 [18 ] 2020 2072-6651 https://www.documentation.ird.fr/hor/fdi:010078821 10.3390/toxins12050321 2072-6651 [F B010078821] https://www.documentation.ird.fr/hor/fdi:010078821 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers20-07/010078821.pdf IRD - Base Horizon / Pleins textes 2020-07-09 2025-02-24 fdi:010078821 fre