Further Advance of Gambierdiscus Species in the Canary Islands, with the First Report of Gambierdiscus belizeanus
Rey Varela, Maria
Andree, Karl B.
Ciguatera Poisoning (CP) is a human food-borne poisoning that has been known since ancient times to be found mainly in tropical and subtropical areas, which occurs when fish or very rarely invertebrates contaminated with ciguatoxins (CTXs) are consumed. The genus of marine benthic dinoflagellates Gambierdiscus produces CTX precursors. The presence of Gambierdiscus species in a region is one indicator of CP risk. The Canary Islands (North Eastern Atlantic Ocean) is an area where CP cases have been reported since 2004. In the present study, samplings for Gambierdiscus cells were conducted in this area during 2016 and 2017. Gambierdiscus cells were isolated and identified as G. australes, G. excentricus, G. caribaeus, and G. belizeanus by molecular analysis. In this study, G. belizeanus is reported for the first time in the Canary Islands. Gambierdiscus isolates were cultured, and the CTX-like toxicity of forty-one strains was evaluated with the neuroblastoma cell-based assay (neuro-2a CBA). G. excentricus exhibited the highest CTX-like toxicity (9.5–2566.7 fg CTX1B equiv. cell−1) followed by G. australes (1.7–452.6.2 fg CTX1B equiv. cell−1). By contrast, the toxicity of G. belizeanus was low (5.6 fg CTX1B equiv. cell−1), and G. caribaeus did not exhibit CTX-like toxicity. In addition, for the G. belizeanus strain, the production of CTXs was evaluated with a colorimetric immunoassay and an electrochemical immunosensor resulting in G. belizeanus producing two types of CTX congeners (CTX1B and CTX3C series congeners) and can contribute to CP in the Canary Islands.
574 - Ecologia general i biodiversitat
637 - Productes dels animals domèstics, de la caça i de la pesca
Is part of
Tudó, Àngels, Greta Gaiani, Maria Rey Varela, Takeshi Tsumuraya, Karl B. Andree, Margarita Fernández-Tejedor, Mònica Campàs, and Jorge Diogène. 2020. "Further Advance Of Gambierdiscus Species In The Canary Islands, With The First Report Of Gambierdiscus Belizeanus". Toxins 12 (11): 692. doi:10.3390/toxins12110692.
Grant agreement number
EFSA/ /GP-EFSA-AFSCO-2015-03/EU/Risk Characterization of Ciguatera Food Poisoning in Europe/EUROCIGUA
MINECO-FEDER/Programa Estatal de I+D+I orientada a los retos de la sociedad/BIO2017-87946-C2-2-R/ES/Dispositivos bioanalíticos para la detección rápida y rentable de gambierdiscus y ciguatoxinas/CIGUASENSING
Aigües Marines i Continentals
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