Ciguatoxin in moray eels raising the risk for seafood safety in Viet Nam

Ha Viet Dao; Hy Ho Khanh Le; Thao Thi Thu Le; Ky Xuan Pham; Minh Quang Bui; Leo Lai Chan

doi:10.1007/s12562-022-01638-6

Ciguatoxin in moray eels raising the risk for seafood safety in Viet Nam

Ha Viet Dao^*, Hy Ho Khanh Le, Thao Thi Thu Le, Ky Xuan Pham, Minh Quang Bui, Leo Lai Chan

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

8 Citations (Scopus)

Abstract

Recently, suspected ciguatera fish poisoning (CFP) cases caused by the consumption of moray eels, popular seafood for locals and tourists, have been reported in Viet Nam. However, little is known about ciguatoxins (CTXs) in these marine fish. In May 2020, 119 specimens of six moray eel species were collected for CTX detection from Ly Son Island (site 1), Ninh Hai Coast (site 2), Phu Quy Island (site 3), and Spratly Islands (site 4), where suspected CFP from moray eel consumption have occurred. CTX-1B was detected by liquid chromatography–mass spectrometry (LC/MS) analysis in 12 specimens belonging to four Gymnothorax species: (G. fimbriatus, G. flavimarginatus, G. javanicus, and G. undulatus), accounting for about 10% of the total specimens. Remarkably, CTX-1B levels detected in all toxic specimens were beyond the safety threshold of 10 pg/g CTX-1B equivalent. The highest occurrence was observed at site 4 (15.6%) (n = 45), followed by site 1 (10.0%) (n = 40) and site 2 (6.3%) (n = 16); whereas no CTX-1B was detected in any specimens (n = 18) from site 3. These results, for the first time, report the presence of CTX-1B, indicating a CFP risk in Viet Nam from consumption of moray eels.

Original language	English
Pages (from-to)	821–830
Journal	Fisheries Science
Volume	88
Issue number	6
Online published	14 Oct 2022
DOIs	https://doi.org/10.1007/s12562-022-01638-6
Publication status	Published - Nov 2022

Funding

This research was funded by Viet Nam Academy of Science and Technology [project grant number TĐĐTB0.01/21-23]. This paper is a contribution to celebrate the 100th anniversary of the Institute of Oceanography, Viet Nam Academy of Science and Technology. This research collaborated with the General Research Fund of the Hong Kong Research Grants Council, grant number CityU11104821. The authors would deliver thanks to Japan Funds in Trust (JFIT) for supporting the regional collaboration of the IOC/WESTPAC-MTSS (Marine Toxins and Seafood Safety) project.

Research Keywords

Ciguatoxin-1B
LC/MS
Moray eels
Seafood safety
Viet Nam

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title = "Ciguatoxin in moray eels raising the risk for seafood safety in Viet Nam",

abstract = "Recently, suspected ciguatera fish poisoning (CFP) cases caused by the consumption of moray eels, popular seafood for locals and tourists, have been reported in Viet Nam. However, little is known about ciguatoxins (CTXs) in these marine fish. In May 2020, 119 specimens of six moray eel species were collected for CTX detection from Ly Son Island (site 1), Ninh Hai Coast (site 2), Phu Quy Island (site 3), and Spratly Islands (site 4), where suspected CFP from moray eel consumption have occurred. CTX-1B was detected by liquid chromatography–mass spectrometry (LC/MS) analysis in 12 specimens belonging to four Gymnothorax species: (G. fimbriatus, G. flavimarginatus, G. javanicus, and G. undulatus), accounting for about 10% of the total specimens. Remarkably, CTX-1B levels detected in all toxic specimens were beyond the safety threshold of 10 pg/g CTX-1B equivalent. The highest occurrence was observed at site 4 (15.6%) (n = 45), followed by site 1 (10.0%) (n = 40) and site 2 (6.3%) (n = 16); whereas no CTX-1B was detected in any specimens (n = 18) from site 3. These results, for the first time, report the presence of CTX-1B, indicating a CFP risk in Viet Nam from consumption of moray eels.",

keywords = "Ciguatoxin-1B, LC/MS, Moray eels, Seafood safety, Viet Nam",

author = "Dao, {Ha Viet} and Le, {Hy Ho Khanh} and Le, {Thao Thi Thu} and Pham, {Ky Xuan} and Bui, {Minh Quang} and Chan, {Leo Lai}",

year = "2022",

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doi = "10.1007/s12562-022-01638-6",

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T1 - Ciguatoxin in moray eels raising the risk for seafood safety in Viet Nam

AU - Dao, Ha Viet

AU - Le, Hy Ho Khanh

AU - Le, Thao Thi Thu

AU - Pham, Ky Xuan

AU - Bui, Minh Quang

AU - Chan, Leo Lai

PY - 2022/11

Y1 - 2022/11

N2 - Recently, suspected ciguatera fish poisoning (CFP) cases caused by the consumption of moray eels, popular seafood for locals and tourists, have been reported in Viet Nam. However, little is known about ciguatoxins (CTXs) in these marine fish. In May 2020, 119 specimens of six moray eel species were collected for CTX detection from Ly Son Island (site 1), Ninh Hai Coast (site 2), Phu Quy Island (site 3), and Spratly Islands (site 4), where suspected CFP from moray eel consumption have occurred. CTX-1B was detected by liquid chromatography–mass spectrometry (LC/MS) analysis in 12 specimens belonging to four Gymnothorax species: (G. fimbriatus, G. flavimarginatus, G. javanicus, and G. undulatus), accounting for about 10% of the total specimens. Remarkably, CTX-1B levels detected in all toxic specimens were beyond the safety threshold of 10 pg/g CTX-1B equivalent. The highest occurrence was observed at site 4 (15.6%) (n = 45), followed by site 1 (10.0%) (n = 40) and site 2 (6.3%) (n = 16); whereas no CTX-1B was detected in any specimens (n = 18) from site 3. These results, for the first time, report the presence of CTX-1B, indicating a CFP risk in Viet Nam from consumption of moray eels.

AB - Recently, suspected ciguatera fish poisoning (CFP) cases caused by the consumption of moray eels, popular seafood for locals and tourists, have been reported in Viet Nam. However, little is known about ciguatoxins (CTXs) in these marine fish. In May 2020, 119 specimens of six moray eel species were collected for CTX detection from Ly Son Island (site 1), Ninh Hai Coast (site 2), Phu Quy Island (site 3), and Spratly Islands (site 4), where suspected CFP from moray eel consumption have occurred. CTX-1B was detected by liquid chromatography–mass spectrometry (LC/MS) analysis in 12 specimens belonging to four Gymnothorax species: (G. fimbriatus, G. flavimarginatus, G. javanicus, and G. undulatus), accounting for about 10% of the total specimens. Remarkably, CTX-1B levels detected in all toxic specimens were beyond the safety threshold of 10 pg/g CTX-1B equivalent. The highest occurrence was observed at site 4 (15.6%) (n = 45), followed by site 1 (10.0%) (n = 40) and site 2 (6.3%) (n = 16); whereas no CTX-1B was detected in any specimens (n = 18) from site 3. These results, for the first time, report the presence of CTX-1B, indicating a CFP risk in Viet Nam from consumption of moray eels.

KW - Ciguatoxin-1B

KW - LC/MS

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ER -

Ciguatoxin in moray eels raising the risk for seafood safety in Viet Nam

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GRF: Investigation of Bioactive Potentials of Benthic and Epiphytic Toxic Algae (BETA) and Their Associated Microbiota

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Ciguatoxin in moray eels raising the risk for seafood safety in Viet Nam

Abstract

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Research Keywords

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GRF: Investigation of Bioactive Potentials of Benthic and Epiphytic Toxic Algae (BETA) and Their Associated Microbiota

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