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Ciguatoxin Detection in Flesh and Liver of Relevant Fish Species from the Canary Islands

Authors :
María José Ramos-Sosa
Natalia García-Álvarez
Andres Sanchez-Henao
Freddy Silva Sergent
Daniel Padilla
Pablo Estévez
María José Caballero
José Luís Martín-Barrasa
Ana Gago-Martínez
Jorge Diogène
Fernando Real
Source :
Toxins, Vol 14, Iss 1, p 46 (2022)
Publication Year :
2022
Publisher :
MDPI AG, 2022.

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 recreational 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 (Epinephelus marginatus), 11 black moray eels (Muraena helena) and 11 common two-banded seabream (Diplodus 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 concentration 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.

Details

Language :
English
ISSN :
14010046 and 20726651
Volume :
14
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Toxins
Publication Type :
Academic Journal
Accession number :
edsdoj.456e84c9f28d4246a7a5daf6e856a0e8
Document Type :
article
Full Text :
https://doi.org/10.3390/toxins14010046