Scientists are helping researchers in Cuba find dangerous toxins in marine algae that can lead to outbreaks from contaminated seafood.
The International Atomic Energy Agency (IAEA) has been building capacity for monitoring ciguatera using nuclear and isotopic techniques to identify seafood biotoxins.
Ciguatoxins are a class of algal toxins. They enter the food chain by consuming Ciguatoxin-containing algae by fish and shellfish and accumulating in larger predatory fish. 
Do not use, sell, serve or distribute the affected products.
Timothy Oyster Fresh Pacific Oysters recalled due to a marine biotoxin which causes Paralytic Shellfish Poisoning (PSP).
Posted in Algal Toxin, CFIA, food contamination, food handler, Food Hazard, Food Hygiene, Food Inspections, Food Micro Blog, Food Microbiology, Food Microbiology Blog, Food Microbiology Testing, Food Poisoning, Food Quality, food recall, Food Safety, Food Safety Alert, Food Safety Management, Food Safety Regulations, Food Testing, Food Toxin, paralytic shellfish poisoning, PSP, Shellfish, shellfish toxin
New Zealand Food Safety is advising the public not to collect or consume shellfish gathered from the Christchurch beaches and Lyttelton Harbour due to the presence of diarrhetic shellfish toxins.
“Routine tests on greenshell mussels from Sumner have shown levels of diarrhetic shellfish toxin over the safe limit,” says New Zealand Food Safety deputy director-general Vincent Arbuckle.
The warning extends from Waimairi Beach to the southern head of Lyttelton Harbour (Adderley Head). The affected area includes Lyttelton Harbour and the Avon and Heathcote River Estuary.
“Please do not gather and eat shellfish from this area because anyone doing so could get sick. Affected shellfish include bivalve shellfish such as mussels, oysters, tuatua, pipi, toheroa, cockles and scallops, as well as pūpū (cat’s eyes), Cook’s turban and kina (sea urchin).”
“Cooking the shellfish does not remove the toxin, so shellfish from this area should not be eaten.”
Symptoms of diarrhetic shellfish poisoning usually appear within 30 minutes of eating and last for about a day. Symptoms may include diarrhoea, vomiting, nausea and abdominal cramps.
Pāua, crab and crayfish may still be eaten if the gut has been completely removed prior to cooking, as toxins accumulate in the gut. If the gut is not removed, its contents could contaminate the meat during the cooking process.
Finfish are not affected by this public health warning, but we advise gutting the fish and discarding the liver before cooking.
New Zealand Food Safety has had no notifications of associated illness.
If anyone becomes ill after eating shellfish from an area where a public health warning has been issued, phone Healthline for advice on 0800 61 11 16, or seek medical attention immediately. You are also advised to contact your nearest public health unit and keep any leftover shellfish in case it can be tested.
“New Zealand Food Safety is monitoring shellfish in the region and will notify the public of any changes to the situation,” says Mr Arbuckle.
Commercially harvested shellfish – sold in shops and supermarkets or exported – is subject to strict water and flesh monitoring programmes by New Zealand Food Safety to ensure they are safe to eat.
For further information and general enquiries, call MPI on 0800 00 83 33 or email info@mpi.govt.nz
For media enquiries, contact the media team on 029 894 0328.
Brand : CONSORZIO COOPERATIVE RIUNITE DELLA PESCA MARCEDDI’
Name : ARSELLE CUORE – VONGOLE VERACI MARCEDDI’
Reason for reporting : Recall due to chemical risk
Publication date : 10 June 2024
Posted in Algal Toxin, food contamination, food handler, Food Hazard, Food Hygiene, Food Inspections, Food Micro Blog, Food Microbiology, Food Microbiology Blog, Food Microbiology Testing, Food Poisoning, Food Quality, food recall, Food Safety, Food Safety Alert, Food Safety Management, Food Safety Regulations, Food Testing, Food Toxin, Lipophilic Marine Biotoxin, Marine Biotoxin, Shellfish, shellfish toxin
Brand : cirdu
Name : arselle Cuore
Reason for reporting : Recall due to chemical risk
Publication date : 10 June 2024
Posted in Algal Toxin, food contamination, food handler, Food Hazard, Food Hygiene, Food Inspections, Food Micro Blog, Food Microbiology, Food Microbiology Research, Food Microbiology Testing, Food Poisoning, Food Quality, food recall, Food Safety, Food Safety Alert, Food Safety Management, Food Safety Regulations, Food Testing, Food Toxin, Lipophilic Marine Biotoxin, Marine Biotoxin, Shellfish, shellfish toxin
Brand : Consorzio Cooperative della Pesca “Marceddì”
Name : Arselle cuore – Vongole veraci Marceddi’
Reason for reporting : Recall due to chemical risk
Publication date : 8 June 2024
Brand : Cooperativa Pescatori Arborea)
Name : Local clams (Ruditapes decussatus)
Reason for reporting : Recall due to chemical risk
Publication date : 8 June 2024
Posted in Algal Toxin, Diarrhoeic Shellfish Poisoning, DSP, food contamination, food handler, Food Hazard, Food Hygiene, Food Inspections, Food Micro Blog, Food Microbiology, Food Microbiology Blog, Food Microbiology Testing, Food Poisoning, Food Quality, food recall, Food Safety, Food Safety Alert, Food Safety Management, Food Safety Regulations, Food Toxin, Food Virus, Lipophilic Marine Biotoxin, Marine Biotoxin, okadaic acid
June 5, 2024
Certain oysters and bay clams harvested from OR growing areas in Netarts Bay and Tillamook Bay, harvested on or after 5/28/24, and shellfish species from growing areas in Willapa Bay, WA: Stony Point, harvested between 5/26/24 and 5/30/24; Bay Center, harvested between 5/29/24 and 5/30/24; and Bruceport, harvested between 5/29/24 and 5/30/24. The shellfish were distributed to restaurants and retailers in AZ, CA, CO, HI, NV, NY, OR, and WA and may have been distributed to other states as well.
The FDA is advising restaurants and food retailers not to serve or sell and to dispose of, and consumers not to eat, oysters and bay clams harvested from growing areas in Netarts Bay and Tillamook Bay, OR harvested on or after 5/28/24, and all shellfish species from growing areas in Willapa Bay, WA: Stony Point, harvested between 5/26/24 and 5/30/24; Bay Center, harvested between 5/29/24 and 5/30/24; and Bruceport, harvested between 5/29/24 and 5/30/24, and distributed to AZ, CA, CO, HI, NV, NY, OR, and WA because they may be contaminated with the toxins that cause paralytic shellfish poisoning (PSP).
Molluscan shellfish contaminated with natural toxins from the water in which they lived can cause consumer illness. Most of these toxins are produced by naturally occurring marine algae (phytoplankton). Molluscan shellfish consume the algae which causes the toxins to accumulate in the shellfish’s flesh. Typically, contamination occurs following blooms of the toxic algal species; however, toxin contamination is possible even when algal concentrations are low in certain instances. One of the recognized natural toxin poisoning syndromes that can occur from consuming contaminated molluscan shellfish is paralytic shellfish poisoning (PSP).
PSP is caused by neurotoxins also referred to as saxitoxins or paralytic shellfish toxins (PSTs). Shellfish can retain the toxin for different lengths of time. Some species cleanse themselves of toxins rapidly, whereas others are much slower to remove the toxins. This lengthens the period of time they pose a human health risk from consumption.
Food containing PSTs may look, smell, and taste normal. These toxins cannot be removed by cooking or freezing. Consumers of these products who are experiencing symptoms of illness should contact their healthcare provider and report their symptoms to their local Health Department.
Posted in Algal Toxin, FDA, food contamination, food handler, Food Hazard, Food Hygiene, Food Inspections, Food Micro Blog, Food Microbiology, Food Microbiology Blog, Food Microbiology Testing, Food Poisoning, Food Quality, food recall, Food Safety, Food Safety Alert, Food Safety Management, Food Safety Regulations, Food Testing, Food Toxin, Lipophilic Marine Biotoxin, Marine Biotoxin, paralytic shellfish poisoning, PSP, shellfish toxin
Ciguatera poisoning (CP) is caused by consumption of fish that have accumulated ciguatoxins in their flesh. CP is endemic in tropical and subtropical regions, particularly in the Pacific and Indian Oceans and the Caribbean Sea. Isolated outbreaks have occurred sporadically in Europe but with an increasing frequency in temperate areas like the Canary Islands, Spain.
CP is not under routine surveillance in the European Union (EU), but unexpected, potentially serious cross-border biological threats to health are monitored by ECDC [1]. Cases are usually not notified in national surveillance systems but may be reported to national poisoning centres.
Ciguatoxins (CTXs) are temperature-stable, so they are not destroyed by cooking or by freezing the fish. Furthermore, the toxins are colourless, odourless, and flavourless, which make it impossible to taste or smell them [2,3].
CP is caused by the consumption of herbivorous fish that feed on toxic microalgae (Gambierdiscus spp. and Fukuyoa spp.), which are attached to macrophytes or dead corals, and from carnivorous fish that have consumed toxic herbivorous fish [3,4].
Over 400 known fish species from tropical and subtropical waters have been classified as potential carriers of CTXs. Examples of the fish most frequently associated with cases of CP include barracuda, grouper, amberjack, snapper, moray eel, hogfish, mackerel, surgeonfish, and parrotfish. Greater severity of illness is associated with eating fish head or organs. It is therefore advisable to avoid consuming visceral organs, roe (fish eggs), and carcasses (e.g. heads, eyes, and bones) of these fish species [4-6].
Person-to-person transmission of CTXs is extremely rare, but transmission of toxin from mother to child during breastfeeding or across the placenta, as well as during sexual intercourse, has been described [6-10].
Intoxication of humans occurs via consumption of fish containing CTXs. In humans, CTXs activate voltage-gated sodium channels in cell membranes, increasing sodium ion permeability and depolarizing the nerve cell. Clinical presentation varies according to the individual characteristics and the geographical origin of the CTXs. Gastrointestinal symptoms can precede or accompany neurological symptoms, which usually appear two to 48 hours after eating the contaminated fish. Symptoms can include nausea, vomiting, diarrhoea, abdominal cramps, paraesthesia of lips, tongue and extremities, cold allodynia (burning pain caused by a normally innocuous cold stimulus), a metallic taste in the mouth, arthralgia, myalgia, pruritus without urticaria or erythema, muscle weakness, blurred vision, painful intercourse, hypotension, and bradycardia [4,8,11].
Cold allodynia is characteristic of CP, although it is not present in all patients. Neurological symptoms usually resolve within weeks, although some symptoms can last for months. Recurrent symptoms can occur following the ingestion of certain food or beverages such as alcohol, nuts, or non-toxic fish. CP is rarely fatal, but death can occur in severe cases due to severe dehydration, cardiovascular shock, or respiratory failure [4,8,11].
According to a study, an outbreak of ciguatera poisoning from contaminated fish affected 19 people on a ship in Australia.
The food poisoning outbreak was reported to the Central Queensland Public Health Unit in December 2021.
A bulk carrier sailing from Higashiharima, Japan, to Gladstone, Australia, reported an incident of sudden illness, with 19 of 20 sailors on board having a combination of gastrointestinal and neurological symptoms.
All 20 sailors consumed a self-caught barracuda and squid prepared by the ship’s cook the day before. Leftover samples of the fish and squid were sent for testing. According to the study published in the journal Communicable Diseases Intelligence, the barracuda sample contained ciguatoxins.
FoodWorld 