Five different species of Gambierdiscus have been identified in La Réunion (G. belizeanus, G. balechii, G. pacificus, G. silvae and G. ribotype 2) by …

Gambierdiscus is known to produce neurotoxins associated with ciguatera poisoning (CP). In New Caledonia (NC), South West Pacific Ocean, there is curr…

Researchers detect algae linked to potentially fatal food poisoning in Hervey Bay prompting calls for more rigorous water testing.

Gambierdiscus is a primary producer of diverse polyether toxins that can biomagnify and transform within marine food webs, posing major risks to marine organisms and human health. Currently, many toxins derived from Gambierdiscus remain unidentified. Existing toxin analysis methodologies primarily rely on known toxins, limiting the representation of toxin diversity and complexity and potentially underestimating associated risks. Herein, we present a Toxin-Screening program for high-throughput screening of polyether compounds by analyzing MS2 fragmentation patterns of detected ions and identifying Pacific Ocean ciguatoxins (P-CTXs) and gambierones through specific ion recognition. Using the Toxin-Screening program, eight P-CTXs purified from fish and Gambierdiscus spp., alongside two commercial gambierones standards, were successfully extracted from 5027 MS2 spectra and annotated. This method was subsequently applied to profile polyether compounds in three Gambierdiscus caribaeus strains, revealing only ten polyether compounds shared among the strains, while strain-specific compounds dominated. All G. caribaeus strains were found to produce gambierone, with levels notably varying among the strains. Several polyether compounds containing one or two SO3 groups suggest a potential novel toxin family that warrants further investigation.

Ciguatera poisoning is the most prevalent non-bacterial seafood illness globally, with an estimated 10,000 to 50,000 human cases reported annually. Wh…

Confirman por primera vez la presencia del género 'Gambierdiscus' en la costa peninsular española, una microalga asociada a la ciguatera

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Troben a la Marina una alga productora de toxines que s’acumulen en peix i marisc

Se ha identificado en la zona de Levante la especie Gambierdiscus australes, que es productor de ciguatoxinas

Los resultados revelan la presencia de 'Gambierdiscus australes' en el 75 por ciento de las muestras recogidas

Los resultados revelan la presencia de 'Gambierdiscus australes' en el 75 por ciento de las muestras recogidas

A species of toxin-producing microalga has now been documented along mainland Spain’s Mediterranean coast, marking the first confirmed appearance of this organism around the Iberian Peninsula. Its arrival extends a food-safety concern, long associated with tropical seas, into waters that supply millions of people with fish. Coastal samples speak Coastal waters off Denia and Javea, along Spain’s southeastern Mediterranean shoreline, provided the first physical record of this Gambierdiscus organism outside tropical island waters. Gambierdiscus is a marine dinoflagellate that is a type of single-celled alga. By examining routine marine samples, Dr. Cesar Bordehore, an ecologist at the University of Alicante (UA), documented the presence of the toxin-producing genus directly in peninsular Mediterranean waters. Archived material from the same coastline showed no trace of the organism in earlier years. This means its presence is due to emergence within the past decade rather than being a long-standing feature. That narrow window frames the finding as recent and dynamic, which sets up the need to understand how far the organism may spread and what conditions allow it to persist. A toxin pathway Near-shore microbes such as Gambierdiscus can release ciguatoxins, nerve-acting poisons that enter into the tissues of grazing or filter-feeding fish. Small...

Han confirmat per primera vegada la presència de Gambierdiscus australs en aigües enfront de Dénia i Xàbia, amb abundàncies de 20-140 cèl·lules per litre. El risc per al consumidor es considera baix i es manté la vigilància científica.

Els científics de la Universitat d'Alacant han detectat per primera vegada en aigües de Dénia i Xàbia (Marina Alta) la presència de Gambierdiscus australes, una microalga tòxica que podria provocar una intoxicació alimentària si mengem peix que en continga.

A toxin-producing tropical microalga has now been confirmed for the first time along Spain’s Mediterranean mainland coast.  Its arrival extends the geographic reach of a group linked to seafood poisoning and redraws where officials must remain alert. Finding Gambierdiscus australes Routine seawater collected off Dénia and Jávea on Spain’s eastern shoreline contained the tropical species