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https://www.readbyqxmd.com/read/27885668/characterization-of-gambierdiscus-lapillus-sp-nov-gonyaulacales-dinophyceae-a-new-toxic-dinoflagellate-from-the-great-barrier-reef-australia
#1
Anna Liza Kretzschmar, Arjun Verma, D Tim Harwood, Mona Hoppenrath, Shauna Murray
Gambierdiscus is a genus of benthic dinoflagellates found worldwide. Some species produce neurotoxins (maitotoxins and ciguatoxins) which bioaccumulate and cause ciguatera fish poisoning, a potentially fatal food-borne illness that is common worldwide in tropical regions. The investigation of toxigenic species of Gambierdiscus in ciguatera fish poisoning endemic regions in Australia is necessary as a first step in order to determine which species of Gambierdiscus are related to ciguatera fish poisoning cases occurring in this region...
November 25, 2016: Journal of Phycology
https://www.readbyqxmd.com/read/27806035/ciguatera-fish-poisoning
#2
Patrick Armstrong, Peter Murray, Annette Nesdale, Brad Peckler
Ciguatera fish poisoning (CFP) is the most common cause of seafood-toxin poisoning in the world and is most prevalent in tropical and subtropical areas. It causes gastroenteritis but also myriad neurological and cardiovascular symptoms. We present a cluster of CFP that occurred in Wellington Hospital, New Zealand. It resulted in three patients with life threatening cardiotoxicity and a fourth case with severe gastro-intestinal symptoms. The epidemiology, clinical manifestations, diagnosis, treatment and public health issues are discussed...
October 28, 2016: New Zealand Medical Journal
https://www.readbyqxmd.com/read/27778083/-first-ciguatera-outbreak-in-germany-in-2012
#3
Miriam Friedemann
In November 2012, 23 cases of ciguatera with typical combinations of gastrointestinal and neurological symptoms occurred in Germany after consumption of imported tropical fish (Lutjanus spp.). A questionnaire was used to gather information on the disease course and fish consumption. All patients suffered from pathognomonic cold allodynia. Aside from two severe courses of illness, all other cases showed symptoms of moderate intensity. During a three-year follow-up, seven patients reported prolonged paresthesia for more than one year...
October 24, 2016: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
https://www.readbyqxmd.com/read/27616971/harmful-algal-blooms-and-public-health
#4
Lynn M Grattan, Sailor Holobaugh, J Glenn Morris
The five most commonly recognized Harmful Algal Bloom related illnesses include Ciguatera poisoning, Paralytic Shellfish poisoning, Neurotoxin Shellfish poisoning, Diarrheic Shellfish Poisoning and Amnesic Shellfish poisoning. Although they are each the product of different toxins, toxin assemblages or HAB precursors these clinical syndromes have much in common. Exposure occurs through the consumption of fish or shellfish; routine clinical tests are not available for diagnosis; there is no known antidote for exposure; and the risk of these illnesses can negatively impact local fishing and tourism industries...
July 2016: Harmful Algae
https://www.readbyqxmd.com/read/27613284/acute-exposure-to-pacific-ciguatoxin-reduces-electroencephalogram-activity-and-disrupts-neurotransmitter-metabolic-pathways-in-motor-cortex
#5
Gajendra Kumar, Ngan Pan Bennett Au, Elva Ngai Yu Lei, Yim Ling Mak, Leanne Lai Hang Chan, Michael Hon Wah Lam, Leo Lai Chan, Paul Kwan Sing Lam, Chi Him Eddie Ma
Ciguatera fish poisoning (CFP) is a common human food poisoning caused by consumption of ciguatoxin (CTX)-contaminated fish affecting over 50,000 people worldwide each year. CTXs are classified depending on their origin from the Pacific (P-CTXs), Indian Ocean (I-CTXs), and Caribbean (C-CTXs). P-CTX-1 is the most toxic CTX known and the major source of CFP causing an array of neurological symptoms. Neurological symptoms in some CFP patients last for several months or years; however, the underlying electrophysiological properties of acute exposure to CTXs remain unknown...
September 10, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27594814/gene-expression-patterns-in-peripheral-blood-leukocytes-in-patients-with-recurrent-ciguatera-fish-poisoning-preliminary-studies
#6
Maria-Cecilia Lopez, Ricardo F Ungaro, Henry V Baker, Lyle L Moldawer, Alison Robertson, Margaret Abbott, Sparkle M Roberts, Lynn M Grattan, J Glenn Morris
Ciguatera fish poisoning (ciguatera) is a common clinical syndrome in areas where there is dependence on tropical reef fish for food. A subset of patients develops recurrent and, in some instances, chronic symptoms, which may result in substantial disability. To identify possible biomarkers for recurrent/chronic disease, and to explore correlations with immune gene expression, peripheral blood leukocyte gene expression in 10 ciguatera patients (7 recurrent, 3 acute) from the U.S. Virgin Islands, and 5 unexposed Florida controls were evaluated...
July 2016: Harmful Algae
https://www.readbyqxmd.com/read/27584136/intractable-seizures-and-rehabilitation-in-ciguatera-poisoning
#7
Armen Derian, Seema Khurana, Joshua Rothenberg, Charles Plumlee
Ciguatera fish poisoning is the most frequently reported seafood toxin illness associated with the ingestion of contaminated tropical fish. Diagnosis relies on a history of recent tropical fish ingestion and subsequent development of gastrointestinal, cardiovascular, and neurological symptoms. Ciguatera poisoning usually has a self-limited time course, and its management involves symptomatic control and supportive care. This case report presents an uncommon case of ciguatera poisoning with prolonged intractable seizures refractory to standard antiseizure medications...
August 31, 2016: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/27485969/analysis-of-gambierdiscus-transcriptome-data-supports-ancient-origins-of-mixotrophic-pathways-in-dinoflagellates
#8
Dana C Price, Natalie Farinholt, Colin Gates, Alexander Shumaker, Nicole E Wagner, Paul Bienfang, Debashish Bhattacharya
Toxic dinoflagellates pose serious threats to human health and to fisheries. The genus Gambierdiscus is significant in this respect because its members produce ciguatoxin that accumulates in predominantly tropical marine food webs and leads to ciguatera fish poisoning. Understanding the biology of toxic dinoflagellates is crucial to developing control strategies. To this end, we generated a de novo transcriptome library from G. caribaeus and studied its growth under different culture conditions to elucidate pathways of carbon (C) and nitrogen (N) utilization...
August 3, 2016: Environmental Microbiology
https://www.readbyqxmd.com/read/27467390/rapid-extraction-and-identification-of-maitotoxin-and-ciguatoxin-like-toxins-from-caribbean-and-pacific-gambierdiscus-using-a-new-functional-bioassay
#9
Richard J Lewis, Marco Inserra, Irina Vetter, William C Holland, D Ransom Hardison, Patricia A Tester, R Wayne Litaker
BACKGROUND: Ciguatera is a circumtropical disease produced by polyether sodium channel toxins (ciguatoxins) that enter the marine food chain and accumulate in otherwise edible fish. Ciguatoxins, as well as potent water-soluble polyethers known as maitotoxins, are produced by certain dinoflagellate species in the genus Gambierdiscus and Fukuyoa spp. in the Pacific but little is known of the potential of related Caribbean species to produce these toxins. METHODS: We established a simplified procedure for extracting polyether toxins from Gambierdiscus and Fukuyoa spp...
2016: PloS One
https://www.readbyqxmd.com/read/27229176/ciguatoxin-reduces-regenerative-capacity-of-axotomized-peripheral-neurons-and-delays-functional-recovery-in-pre-exposed-mice-after-peripheral-nerve-injury
#10
Ngan Pan Bennett Au, Gajendra Kumar, Pallavi Asthana, Chung Tin, Yim Ling Mak, Leo Lai Chan, Paul Kwan Sing Lam, Chi Him Eddie Ma
Ciguatera fish poisoning (CFP) results from consumption of tropical reef fish containing ciguatoxins (CTXs). Pacific (P)-CTX-1 is among the most potent known CTXs and the predominant source of CFP in the endemic region responsible for the majority of neurological symptoms in patients. Chronic and persistent neurological symptoms occur in some CFP patients, which often result in incomplete functional recovery for years. However, the direct effects of exposure to CTXs remain largely unknown. In present study, we exposed mice to CTX purified from ciguatera fish sourced from the Pacific region...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27160878/ciguatera-fish-poisoning-after-caribbean-travel
#11
Courtney A Thompson, Farah Jazuli, Linda R Taggart, Andrea K Boggild
No abstract text is available yet for this article.
May 9, 2016: CMAJ: Canadian Medical Association Journal, Journal de L'Association Medicale Canadienne
https://www.readbyqxmd.com/read/27159509/invasive-lionfish-pterosis-volitans-pose-public-health-threats
#12
James H Diaz
The lionfish, Pterosis volitans, a native of Indo-Pacific oceans, is a popular saltwater aquarium fish despite venomous spines on its fins. Lionfish were inadvertently introduced into the western Atlantic from Florida in the early 1990s and have overpopulated and dispersed widely into the Caribbean Sea and Gulf of Mexico. Initiatives to control lionfish populations were launched, including the National Oceanographic and Atmospheric Administration (NOAA)-sponsored "Lionfish as Food Campaign".2 Recently, scientists from the Food and Drug Administration (FDA) reported that lionfish caught off the US Virgin Islands contained ciguatoxins and could cause ciguatera fish poisoning (CFP); a seafood-borne poisoning without an antidote or any specific treatment, and a potential for prolonged neurotoxicity...
July 2015: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/27138536/invasive-lionfish-pterosis-volitans-pose-public-health-threats
#13
James H Diaz
The lionfish, Pterosis volitans, a native of Indo-Pacific oceans, is a popular saltwater aquarium fish despite venomous spines on its fins. Lionfish were inadvertently introduced into the western Atlantic from Florida in the early 1990s and have overpopulated and dispersed widely into the Caribbean Sea and Gulf of Mexico. Initiatives to control lionfish populations were launched, including the National Oceanographic and Atmospheric Administration (NOAA)-sponsored "Lionfish as Food Campaign".2 Recently, scientists from the Food and Drug Administration (FDA) reported that lionfish caught off the US Virgin Islands contained ciguatoxins and could cause ciguatera fish poisoning (CFP); a seafood-borne poisoning without an antidote or any specific treatment, and a potential for prolonged neurotoxicity...
July 2015: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/27080020/clinical-diagnosis-and-chemical-confirmation-of-ciguatera-fish-poisoning-in-new-south-wales-australia
#14
Hazel Farrell, Anthony Zammit, Jennifer Manning, Craig Shadbolt, Lisa Szabo, D Tim Harwood, Paul McNabb, John A Turahui, Debra J van den Berg
Ciguatera fish poisoning is common in tropical and sub-tropical areas and larger fish (> 10 kg) are more susceptible to toxin accumulation with age. Although the coastal climate of northern New South Wales is considered sub-tropical, prior to 2014 there has only been 1 documented outbreak of ciguatera fish poisoning from fish caught in the region. During February and March 2014, 2 outbreaks of ciguatera fish poisoning involved 4 and 9 individuals, respectively, both following consumption of Spanish mackerel from northern New South Wales coastal waters (Evans Head and Scotts Head)...
March 2016: Communicable Diseases Intelligence Quarterly Report
https://www.readbyqxmd.com/read/27074134/influence-of-environmental-variables-on-gambierdiscus-spp-dinophyceae-growth-and-distribution
#15
Yixiao Xu, Mindy L Richlen, Justin D Liefer, Alison Robertson, David Kulis, Tyler B Smith, Michael L Parsons, Donald M Anderson
Benthic dinoflagellates in the genus Gambierdiscus produce the ciguatoxin precursors responsible for the occurrence of ciguatera toxicity. The prevalence of ciguatera toxins in fish has been linked to the presence and distribution of toxin-producing species in coral reef ecosystems, which is largely determined by the presence of suitable benthic habitat and environmental conditions favorable for growth. Here using single factor experiments, we examined the effects of salinity, irradiance, and temperature on growth of 17 strains of Gambierdiscus representing eight species/phylotypes (G...
2016: PloS One
https://www.readbyqxmd.com/read/27073998/fluorescent-receptor-binding-assay-for-detecting-ciguatoxins-in-fish
#16
D Ransom Hardison, William C Holland, Jennifer R McCall, Andrea J Bourdelais, Daniel G Baden, H Taiana Darius, Mireille Chinain, Patricia A Tester, Damian Shea, Harold A Flores Quintana, James A Morris, R Wayne Litaker
Ciguatera fish poisoning is an illness suffered by > 50,000 people yearly after consumption of fish containing ciguatoxins (CTXs). One of the current methodologies to detect ciguatoxins in fish is a radiolabeled receptor binding assay (RBA(R)). However, the license requirements and regulations pertaining to radioisotope utilization can limit the applicability of the RBA(R) in certain labs. A fluorescence based receptor binding assay (RBA(F)) was developed to provide an alternative method of screening fish samples for CTXs in facilities not certified to use radioisotopes...
2016: PloS One
https://www.readbyqxmd.com/read/26787145/characteristic-features-and-contributory-factors-in-fatal-ciguatera-fish-poisoning-implications-for-prevention-and-public-education
#17
REVIEW
Thomas Y K Chan
In this review, the main objective was to describe the characteristic features of fatal ciguatera fish poisoning and identify contributory factors, with a view to promote prevention and public education. Ciguatera-related deaths, although rare, have been reported from the Pacific, Caribbean, and Indian Ocean regions. The clinical features were generally dominated by convulsions and coma, with various focal neurological signs. Several contributory factors could be identified, including consumption of ciguatoxin (CTX)-rich fish parts (viscera and head) in larger amounts, the most ciguatoxic fish species (e...
April 2016: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/26686980/characterization-of-a-strain-of-fukuyoa-paulensis-dinophyceae-from-the-western-mediterranean-sea
#18
Aitor Laza-Martínez, Helena David, Pilar Riobó, Irati Miguel, Emma Orive
A single cell of the dinoflagellate genus Fukuyoa was isolated from the island of Formentera (Balearic Islands, west Mediterranean Sea), cultured, and characterized by morphological and molecular methods and toxin analyses. This is the first report of the Gambierdiscus lineage (genera Fukuyoa and Gambierdiscus) from the western Mediterranean Sea, which is cooler than its eastern basin. Molecular analyses revealed that the Mediterranean strain belongs to F. paulensis and that it bears LSU rDNA sequences identical to New Zealand, Australian, and Brazilian strains...
July 2016: Journal of Eukaryotic Microbiology
https://www.readbyqxmd.com/read/26562445/release-of-neuropeptides-from-a-neuro-cutaneous-co-culture-model-a-novel-in%C3%A2-vitro-model-for-studying-sensory-effects-of-ciguatoxins
#19
Raphaele Le Garrec, Killian L'herondelle, Christelle Le Gall-Ianotto, Nicolas Lebonvallet, Raphael Leschiera, Virginie Buhe, Matthieu Talagas, Irina Vetter, Richard J Lewis, Laurent Misery
Ciguatoxins are the major toxins responsible for ciguatera fish poisoning, a disease dominated by muco-cutaneous sensory disorders including paresthesiae, cold dysesthesia and pruritus. While the ciguatoxins are well known to target voltage-gated sodium channels (VGSCs), the ensuing molecular mechanisms underlying these sensory disorders remain poorly understood. In this study, we propose a primary sensory neuron-keratinocyte co-culture as an appropriate model to study the neuro-cutaneous effects of ciguatoxins...
June 15, 2016: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/26541571/an-updated-ciguatoxin-extraction-method-and-silica-cleanup-for-use-with-hplc-ms-ms-for-the-analysis-of-p-ctx-1-pctx-2-and-p-ctx-3
#20
Lauren Meyer, Steve Carter, Angela Capper
Ciguatera fish poisoning is a debilitating human neuro-intoxication caused by consumption of tropical marine organisms, contaminated with bioaccumulated ciguatoxins (CTXs). The growing number of cases coupled with the high toxicity of CTXs makes their reliable detection and quantification of paramount importance. Three commonly occurring ciguatoxins, P-CTX-1, 2 and 3 from five different ciguatoxic Spanish mackerel (Scomberomorus commerson), were used to assess the effectiveness of different extraction techniques: homogenization (high powered blending vs...
December 15, 2015: Toxicon: Official Journal of the International Society on Toxinology
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