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Title: Ciguatoxin Detection in Flesh and Liver of Relevant Fish Species from the Canary Islands
Authors: Ramos Sosa, María José 
García Álvarez, Natalia 
Sánchez Henao, Julián Andrés 
Silva Sergent, Freddy Alejandro 
Padilla Castillo, Daniel Fermín 
Estévez, Pablo
Caballero Cansino, María José 
Martín Barrasa, José Luis 
Gago-Martínez, Ana
Diogène, Jorge
Real Valcárcel, Fernando 
UNESCO Clasification: 310905 Microbiología
Keywords: Amberjack
Canary Islands
Common Two-Banded Seabream
Dusky Grouper, et al
Issue Date: 2022
Journal: Toxins 
Abstract: The Canary Islands are a ciguatoxin (CTX) hotspot with an established official monitoring for the detection of CTX in fish flesh from the authorised points of first sale. Fish caught by recrea-tional fishermen are not officially tested and the consumption of toxic viscera or flesh could lead to ciguatera poisoning (CP). The objectives of this study were to determine the presence of CTX-like toxicity in relevant species from this archipelago, compare CTX levels in liver and flesh and examine possible factors involved in their toxicity. Sixty amberjack (Seriola spp.), 27 dusky grouper (Epineph-elus marginatus), 11 black moray eels (Muraena helena) and 11 common two-banded seabream (Dip-lodus vulgaris) were analysed by cell-based assay (CBA) and Caribbean ciguatoxin-1 (C-CTX1) was detected by liquid chromatography mass spectrometry (LC-MS/MS) in all these species. Most of the liver displayed higher CTX levels than flesh and even individuals without detectable CTX in flesh exhibited hepatic toxicity. Black moray eels stand out for the large difference between CTX concen-tration in both tissues. None of the specimens with non-toxic liver showed toxicity in flesh. This is the first evidence of the presence of C-CTX1 in the common two-banded seabream and the first report of toxicity comparison between liver and muscle from relevant fish species captured in the Canary Islands.
ISSN: 2072-6651
DOI: 10.3390/toxins14010046
Source: Toxins [ISSN 2072-6651], v. 14 (1), (Enero 2022)
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