Four recent ciguatera fish poisoning incidents in New South Wales, Australia linked to imported fish

Abstract

Between 2015 and 2017, the NSW Food Authority investigated 4 ciguatera fish poisoning incidents linked to fish caught in tropical Australian and international waters and imported to New South Wales. Three of the implicated fish were caught near the Capel Bank Seamount, part of the Lord Howe Island Seamount Chain off the coast of Queensland. The fourth incident, in 2017, involved a fish caught between Cooktown and Lizard island, also off the Queensland coast. Thirteen individuals were affected. Early identification of potential Ciguatera fish poisoning (CFP) cases can facilitate a faster incident response, patient diagnosis and treatment. While different fish species were involved, and the severity and duration of symptoms varied between individuals, 3 of the 4 incidents were distinguished by those affected having consumed a fish meal prepared with the head of the fish. Affected individuals also described a sensation of hot/cold temperature reversal or a painful ‘sharpness’ when in contact with or drinking cold water. This paper outlines a series of incidents where a case’s symptoms, which can vary substantially in conjunction with their previous exposure history, the type of fish consumed and how the fish was cooked, can be used to identify potential CFP cases and hence CFP risks that may need to be addressed. \nKeywords: Ciguatera fish poisoning, ciguatoxins, seafood borne illness, New South Wales, Australia, Pacific ciguatoxin 1-B (P-CTX-1B).