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[PMID]:29358154
[Au] Autor:Turner AD; Waack J; Lewis A; Edwards C; Lawton L
[Ad] Endereço:Centre for Environment, Fisheries and Aquaculture Science, Barrack Road, The Nothe, Weymouth, Dorset DT4 8UB, United Kingdom. Electronic address: andrew.turner@cefas.co.uk.
[Ti] Título:Development and single-laboratory validation of a UHPLC-MS/MS method for quantitation of microcystins and nodularin in natural water, cyanobacteria, shellfish and algal supplement tablet powders.
[So] Source:J Chromatogr B Analyt Technol Biomed Life Sci;1074-1075:111-123, 2018 Feb 01.
[Is] ISSN:1873-376X
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:A simple, rapid UHPLC-MS/MS method has been developed and optimised for the quantitation of microcystins and nodularin in wide variety of sample matrices. Microcystin analogues targeted were MC-LR, MC-RR, MC-LA, MC-LY, MC-LF, LC-LW, MC-YR, MC-WR, [Asp3] MC-LR, [Dha7] MC-LR, MC-HilR and MC-HtyR. Optimisation studies were conducted to develop a simple, quick and efficient extraction protocol without the need for complex pre-analysis concentration procedures, together with a rapid sub 5min chromatographic separation of toxins in shellfish and algal supplement tablet powders, as well as water and cyanobacterial bloom samples. Validation studies were undertaken on each matrix-analyte combination to the full method performance characteristics following international guidelines. The method was found to be specific and linear over the full calibration range. Method sensitivity in terms of limits of detection, quantitation and reporting were found to be significantly improved in comparison to LC-UV methods and applicable to the analysis of each of the four matrices. Overall, acceptable recoveries were determined for each of the matrices studied, with associated precision and within-laboratory reproducibility well within expected guidance limits. Results from the formalised ruggedness analysis of all available cyanotoxins, showed that the method was robust for all parameters investigated. The results presented here show that the optimised LC-MS/MS method for cyanotoxins is fit for the purpose of detection and quantitation of a range of microcystins and nodularin in shellfish, algal supplement tablet powder, water and cyanobacteria. The method provides a valuable early warning tool for the rapid, routine extraction and analysis of natural waters, cyanobacterial blooms, algal powders, food supplements and shellfish tissues, enabling monitoring labs to supplement traditional microscopy techniques and report toxicity results within a short timeframe of sample receipt. The new method, now accredited to ISO17025 standard, is simple, quick, applicable to multiple matrices and is highly suitable for use as a routine, high-throughout, fast turnaround regulatory monitoring tool.
[Mh] Termos MeSH primário: Cromatografia Líquida de Alta Pressão/métodos
Cianobactérias/química
Suplementos Nutricionais/análise
Microcistinas/análise
Peptídeos Cíclicos/análise
Frutos do Mar/análise
[Mh] Termos MeSH secundário: Animais
Produtos Biológicos/análise
Produtos Biológicos/química
Bivalves
Contaminação de Alimentos
Limite de Detecção
Modelos Lineares
Reprodutibilidade dos Testes
Comprimidos
Espectrometria de Massas em Tandem/métodos
Poluentes Químicos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biological Products); 0 (Microcystins); 0 (Peptides, Cyclic); 0 (Tablets); 0 (Water Pollutants, Chemical); 0979BIK2QU (nodularin)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180124
[St] Status:MEDLINE


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[PMID]:29311448
[Au] Autor:Yamamoto A; Kudo S; Nakaya M; Hanaishi R; Masuda Y; Kimura J; Sakuraba A; Shibata M; Kudo S; Itsukaichi T; Sato H; Murakami A; Kogawa A
[Ad] Endereço:Aomori Prefectural Public Health and Environment Center.
[Ti] Título:[Validation Study of Analytical Method for Determination of Amnesic Shellfish Poison in Bivalves].
[So] Source:Shokuhin Eiseigaku Zasshi;58(6):281-287, 2017.
[Is] ISSN:1882-1006
[Cp] País de publicação:Japan
[La] Idioma:jpn
[Ab] Resumo:Amnesic shellfish poison (ASP) is regarded as one of the shellfish poison groups in the EU, though it is not subject to regulation in Japan. We have developed an analytical method of ASP based on the report by Hatfield et al. and other methods. Validation studies were carried out with certified compositional reference materials (CRM). Performance parameters were estimated based on 17 analytical results. The estimate of trueness was 97.5%, and the estimate of intralaboratory reproducibility (RSD) was 1.5%. The HorRat(r) value was 0.16. These performance parameters meet the criteria in the Codex Procedural Manual. Furthermore, internal quality control was performed by using the CRM. The action limits were set based on the performance parameters of the method. Most of the results of the internal quality control were within the action limit range. The results confirmed that the quality of the analyses was well maintained. The purpose of the analytical method is to confirm that the level of ASP in scallop is less than 4.6 mg/kg. The applicability of the analytical method to scallops was confirmed by using spiked samples.
[Mh] Termos MeSH primário: Bivalves/química
Cromatografia Líquida de Alta Pressão/métodos
Ácido Caínico/análogos & derivados
Intoxicação por Frutos do Mar/etiologia
Intoxicação por Frutos do Mar/prevenção & controle
Frutos do Mar/análise
[Mh] Termos MeSH secundário: Animais
Cromatografia Líquida de Alta Pressão/instrumentação
Monitoramento Ambiental/métodos
Ácido Caínico/análise
Ácido Caínico/química
Ácido Caínico/toxicidade
Pectinidae/química
Controle de Qualidade
Reprodutibilidade dos Testes
Raios Ultravioleta
[Pt] Tipo de publicação:JOURNAL ARTICLE; VALIDATION STUDIES
[Nm] Nome de substância:
M02525818H (domoic acid); SIV03811UC (Kainic Acid)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180123
[Lr] Data última revisão:
180123
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180110
[St] Status:MEDLINE
[do] DOI:10.3358/shokueishi.58.281


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[PMID]:29267301
[Au] Autor:Murakami M; Suzuki M; Yamaguchi T
[Ad] Endereço:Department of Health Risk Communication, Fukushima Medical University School of Medicine, Fukushima, Fukushima, Japan.
[Ti] Título:Presenting information on regulation values improves the public's sense of safety: Perceived mercury risk in fish and shellfish and its effects on consumption intention.
[So] Source:PLoS One;12(12):e0188758, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Risk communication aims to promote health and understanding through information exchange; however, explanations regarding the basis of regulation values for the public are insufficient. Moreover, it is unclear how information presentation affects the public's sense of safety and their consumption intentions. We first investigated the relationship between perception of mercury-risk in fish and shellfish and individual attributes and knowledge. We then examined how presenting information on regulation values and primary factors regarding perception affected sense of safety toward regulations and food-consumption intentions. An online survey was conducted with Japanese individuals (N = 1148). Respondents were randomly assigned to one of three groups based on the presentation level of regulation values. People who frequently consumed tuna had a high perception of dread risk of mercury. This suggests that the dread risk perception of mercury does not determine tuna-type consumption behavior; rather, individuals' consumption behavior determines dread risk perception of mercury. Among those with high tuna-type consumption, those receiving information that a safety factor of 10 times had been considered showed a significantly greater sense of safety than did the group that was not presented with information on regulation values (odds ratio (95% confidence interval): 2.04 (1.18-3.53), p < 0.05). However, presentation of regulation values showed a weak but significantly positive correlation with excessive intake of tuna-type fish (odds ratio: 2.95 (0.93-9.32), p < 0.10). Presenting the information on regulation values increases sense of safety; however, it may also lead to excessive intake.
[Mh] Termos MeSH primário: Mercúrio/análise
Opinião Pública
Alimentos Marinhos
Frutos do Mar
[Mh] Termos MeSH secundário: Adulto
Medo
Feminino
Contaminação de Alimentos/análise
Seres Humanos
Japão
Masculino
Meia-Idade
Medição de Risco
Inquéritos e Questionários
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
FXS1BY2PGL (Mercury)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180116
[Lr] Data última revisão:
180116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171222
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0188758


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[PMID]:28810227
[Au] Autor:Campos CJA; Goblick G; Lee R; Wittamore K; Lees DN
[Ad] Endereço:Centre for Environment, Fisheries and Aquaculture Science (Cefas), Weymouth Laboratory, Weymouth DT48UB, UK. Electronic address: carlos.campos@cefas.co.uk.
[Ti] Título:Determining the zone of impact of norovirus contamination in shellfish production areas through microbiological monitoring and hydrographic analysis.
[So] Source:Water Res;124:556-565, 2017 Nov 01.
[Is] ISSN:1879-2448
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Norovirus (NoV) contamination of filter feeding bivalve shellfish is a well-recognised human health threat when shellfish are grown in sewage polluted waters. To date, the identification of high risk zones around sewage discharges in shellfish production areas (SPAs) has not been based on NoV data. This study utilised molecular methods for NoV analysis, combined with hydrographic studies, to determine the relationship between NoV concentrations in shellfish and sewage effluent dilution. Cages with mussels and oysters were placed at different distances downstream of sewage discharges in two coastal sites in England. The shellfish were tested for concentrations of NoV (genogroups I and II) and E. coli. Drogue tracking and dye tracing studies were conducted to quantify the dispersion and dilution of sewage effluent in the SPAs. Significant negative associations were found between both total concentrations of NoV (GI + GII) and E. coli and sewage effluent dilution in the SPAs. The total NoV concentrations predicted by the model at 300:1, 1000:1 and 5000:1 ratios of estuarine water to sewage effluent were 1200; 600; and 200 copies/g, respectively. The estimated area of NoV contamination varied according with local pollution source impacts and hydrographic characteristics. The results help to inform the derivation of sewage discharge buffer zones as a control measure for mitigating risk from human NoV contamination in SPAs.
[Mh] Termos MeSH primário: Norovirus
Frutos do Mar/virologia
[Mh] Termos MeSH secundário: Animais
Inglaterra
Escherichia coli
Seres Humanos
Ostreidae
Esgotos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Sewage)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171020
[Lr] Data última revisão:
171020
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170816
[St] Status:MEDLINE


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[PMID]:28782999
[Au] Autor:Tabanelli G; Montanari C; Gardini A; Maffei M; Prioli C; Gardini F
[Ad] Endereço:1 Centro Interdipartimentale di Ricerca Industriale Agroalimentare, Università degli Studi di Bologna, Sede di Cesena, Via Quinto Bucci 336, 47521 Cesena (FC), Italy (ORCID: http://orcid.org/0000-0002-2273-2371 [C.M.]).
[Ti] Título:Environmental Factors Affecting Escherichia coli Concentrations in Striped Venus Clam (Chamelea gallina L.) Harvested in the North Adriatic Sea.
[So] Source:J Food Prot;80(9):1429-1435, 2017 Sep.
[Is] ISSN:1944-9097
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The aim of this work was to evaluate the microbiological quality of striped venus clams (Chamelea gallina L.) harvested in the north Adriatic Sea during an 8-year monitoring period. A total of 387 samples were analyzed to assess the presence of Escherichia coli. Environmental parameters (salinity, pH, dissolved oxygen, seawater temperature, and freshwater outflow) were collected to find out a possible relationship between the E. coli counts and environmental factors. The results evidenced that the microbiological quality of the clams was good, with only about 5% of the samples not complying with European and Italian regulations for this product, that is, with E. coli counts higher than 230 most probable number (MPN) per 100 g of flesh and intravalvar liquid. Statistical analyses revealed a relationship between microbial contamination and the season and water temperature, probably due to the difference in the filtering activity of the mollusks. However, the main factor affecting the E. coli concentration in the clams turned out to be the flow rate of Marecchia, the major river that reaches the sea in the area of harvesting. In fact, a model fitted to evaluate the probability of finding a higher E. coli count in relation to the environmental parameters evidenced that it was an increase of the level of the Marecchia led to a higher probability of elevated E. coli contamination. This result could be explained by the higher supply of both nutrients and coliforms (including E. coli) when the river is higher and by the anthropogenic characteristics of the lands crossed by the river.
[Mh] Termos MeSH primário: Bivalves/microbiologia
Escherichia coli/crescimento & desenvolvimento
Contaminação de Alimentos/análise
Frutos do Mar/microbiologia
[Mh] Termos MeSH secundário: Animais
Microbiologia Ambiental
Escherichia coli/isolamento & purificação
Itália
Água do Mar
Microbiologia da Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171102
[Lr] Data última revisão:
171102
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170808
[St] Status:MEDLINE
[do] DOI:10.4315/0362-028X.JFP-17-058


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[PMID]:28780871
[Au] Autor:Li B; Meng J; Li L; Liu S; Wang T; Zhang G
[Ad] Endereço:University of Chinese Academy of Sciences , Beijing 100049, China.
[Ti] Título:Identification and Functional Characterization of the Glycogen Synthesis Related Gene Glycogenin in Pacific Oysters (Crassostrea gigas).
[So] Source:J Agric Food Chem;65(35):7764-7773, 2017 Sep 06.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:High glycogen levels in the Pacific oyster (Crassostrea gigas) contribute to its flavor, quality, and hardiness. Glycogenin (CgGN) is the priming glucosyltransferase that initiates glycogen biosynthesis. We characterized the full sequence and function of C. gigas CgGN. Three CgGN isoforms (CgGN-α, ß, and γ) containing alternative exon regions were isolated. CgGN expression varied seasonally in the adductor muscle and gonadal area and was the highest in the adductor muscle. Autoglycosylation of CgGN can interact with glycogen synthase (CgGS) to complete glycogen synthesis. Subcellular localization analysis showed that CgGN isoforms and CgGS were located in the cytoplasm. Additionally, a site-directed mutagenesis experiment revealed that the Tyr200Phe and Tyr202Phe mutations could affect CgGN autoglycosylation. This is the first study of glycogenin function in marine bivalves. These findings will improve our understanding of glycogen synthesis and accumulation mechanisms in mollusks. The data are potentially useful for breeding high-glycogen oysters.
[Mh] Termos MeSH primário: Crassostrea/genética
Glicogênio/biossíntese
Frutos do Mar/análise
[Mh] Termos MeSH secundário: Animais
Crassostrea/enzimologia
Crassostrea/metabolismo
Sistema da Enzima Desramificadora do Glicogênio/genética
Sistema da Enzima Desramificadora do Glicogênio/metabolismo
Glicogênio Sintase/genética
Glicogênio Sintase/metabolismo
Isoformas de Proteínas/genética
Isoformas de Proteínas/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Glycogen Debranching Enzyme System); 0 (Protein Isoforms); 9005-79-2 (Glycogen); EC 2.4.1.11 (Glycogen Synthase); EC 2.4.1.25 (4 alpha-glucanotransferase)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170915
[Lr] Data última revisão:
170915
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170808
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.7b02720


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[PMID]:28718096
[Au] Autor:Gbogbo F; Otoo SD; Asomaning O; Huago RQ
[Ad] Endereço:Department of Animal Biology and Conservation Science, University of Ghana, P. O. Box LG 67, Legon, Accra, Ghana. fgbogbo@ug.edu.gh.
[Ti] Título:Contamination status of arsenic in fish and shellfish from three river basins in Ghana.
[So] Source:Environ Monit Assess;189(8):400, 2017 Aug.
[Is] ISSN:1573-2959
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Fish and shellfish are regularly consumed and sold in Ghana, yet studies on arsenic pollution in Ghana are limited largely to ground water. This study evaluated arsenic concentrations in seven species of shellfish and 10 species of fish inhabiting the mouth of Ankobra, Densu and Volta basins in Ghana and assessed the public health implications. Arsenic levels varied from 0.2 to 2.2 mg L in the three rivers and were higher than WHO recommended values of 10 µg L for drinking water. Except for Periophthalmus sp. and Tympanotonus fuscatus from the Ankobra in which arsenic was not detected, concentrations in the organisms ranged from 0.2 to 2.8 mg kg . The maximum quantities of the organisms considered safe for consumption ranged from 375 to 5250 g per week. Caution however needs to be exercised as PTWI for arsenic needs revision, and some heavy metals such as mercury are more toxic than arsenic.
[Mh] Termos MeSH primário: Arsênico/metabolismo
Monitoramento Ambiental
Poluentes Químicos da Água/metabolismo
[Mh] Termos MeSH secundário: Animais
Arsênico/análise
Peixes/metabolismo
Gana
Mercúrio/análise
Metais Pesados/análise
Rios/química
Frutos do Mar/análise
Frutos do Mar/estatística & dados numéricos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Metals, Heavy); 0 (Water Pollutants, Chemical); FXS1BY2PGL (Mercury); N712M78A8G (Arsenic)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170913
[Lr] Data última revisão:
170913
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170719
[St] Status:MEDLINE
[do] DOI:10.1007/s10661-017-6118-9


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[PMID]:28717110
[Au] Autor:Hoang VAT; Sakamoto M; Yamamoto M
[Ad] Endereço:Department of Basic Medical Science, National Institute for Minamata Disease.
[Ti] Título:Mercury and selenium levels, and their molar ratios in several species of commercial shrimp in Japan regarding the health risk of methylmercury exposure.
[So] Source:J Toxicol Sci;42(4):509-517, 2017.
[Is] ISSN:1880-3989
[Cp] País de publicação:Japan
[La] Idioma:eng
[Ab] Resumo:The Japanese shrimp industry depends on importing shrimp from other countries. However, little information is available on mercury speciation and selenium (Se) concentrations in commercial shrimp available in Japan. The present study determined the concentrations of total mercury (T-Hg), methylmercury (MeHg), and Se in the muscles (wet weight) of imported and domestic commercial shrimp from Kumamoto and Kagoshima prefectures to obtain information for assessing the risk of MeHg exposure. The median concentrations of T-Hg, MeHg and Se in shrimp imported from three different countries were, respectively: black tiger shrimp (n = 18), 15.8, 14.4, and 415 ng/g; Vannamei shrimp (n = 25), 11.4, 11.2, and 292 ng/g; and white shrimp (n = 26), 26.8, 26.1, and 396 ng/g. There were significant differences in T-Hg and MeHg concentrations between shrimp imported from different countries. The median concentrations of T-Hg, MeHg and Se in shrimp of Japanese origin were, respectively: Shiba shrimp (n = 10), 15.9, 15.0, and 270 ng/g; Kuruma shrimp (n = 10), 79.9, 75.9, and 390 ng/g; and Ashiaka shrimp (n = 10), 36.1, 34.1, and 303 ng/g. The percentages of MeHg in T-Hg were between 90% and 99%, with MeHg levels in the imported and domestic commercial shrimp lower than the Japanese regulation of 300 ng/g for fish. The mean Se/T-Hg molar ratios (16-160) were comparatively higher than those previously reported in fish. Overall, this survey suggests that shrimp commercially available in Japan will not pose a particularly high risk regarding MeHg exposure to consumers.
[Mh] Termos MeSH primário: Poluentes Ambientais/análise
Análise de Alimentos
Contaminação de Alimentos/análise
Mercúrio/análise
Compostos de Metilmercúrio/análise
Penaeidae/química
Compostos de Selênio/análise
Frutos do Mar/análise
[Mh] Termos MeSH secundário: Animais
Japão
Risco
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Environmental Pollutants); 0 (Methylmercury Compounds); 0 (Selenium Compounds); FXS1BY2PGL (Mercury)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171005
[Lr] Data última revisão:
171005
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170719
[St] Status:MEDLINE
[do] DOI:10.2131/jts.42.509


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[PMID]:28710691
[Au] Autor:Valencia-Castañeda G; Millán-Almaraz MI; Fierro-Sañudo JF; Fregoso-López MG; Páez-Osuna F
[Ad] Endereço:Posgrado en Ciencias del Mar y Limnología, Unidad Académica Mazatlán, ICML-UNAM, Joel Montes Camarena s/n, 82040, Mazatlán, Sinaloa, México.
[Ti] Título:Monitoring of inland waters for culturing shrimp Litopenaeus vannamei: application of a method based on survival and chemical composition.
[So] Source:Environ Monit Assess;189(8):395, 2017 Aug.
[Is] ISSN:1573-2959
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:This study evaluated the suitability of 21 inland waters (16 well waters and 5 surface waters) from Northwest Mexico via short- (48 h) and medium-term (28 days) tests using postlarvae (PL18) of Litopenaeus vannamei. In the short test, survival was assessed at 48 h after shrimp were placed in groups of 10 postlarvae into 2-L containers of inland water, to which they had been previously acclimated. The second, medium-term test consisted of four replicates with 10 postlarvae, and each group was placed in 15-L containers with the treatment water. Weights (initial and final) and survival were evaluated weekly for 28 days. In those waters for which the short test was positive and the medium-term test was negative and which also had a deficiency of potassium and/or magnesium, a third test was conducted. These last waters were supplemented with salts, and the shrimp survival and weights (initial and final) were recorded for 28 days. The water samples from San Jose, Mochicahui, Sinaloa River, Caimanero inner Lagoon, La Pipima, Campo Santa Fe, Escopama, and Fitmar had >60% survival in the short test. The Caimanero inner Lagoon water had the highest survival (87.5 ± 9.6%) and final mean weight (201.3 ± 86.2 mg). In the third test, it was found that shrimp in the water from La Pipima, Campo Santa Fe, and Fitmar exhibited 100% survival for 2 weeks. Finally, in this work, a decision tree to evaluate the suitability of low-salinity water for shrimp farming was proposed, which can be applied in other regions.
[Mh] Termos MeSH primário: Monitoramento Ambiental
Penaeidae/fisiologia
Frutos do Mar
Água/química
[Mh] Termos MeSH secundário: Animais
Aquicultura
Suplementos Nutricionais
Magnésio/metabolismo
México
Penaeidae/crescimento & desenvolvimento
Potássio/metabolismo
Sais/metabolismo
Qualidade da Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Salts); 059QF0KO0R (Water); I38ZP9992A (Magnesium); RWP5GA015D (Potassium)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171018
[Lr] Data última revisão:
171018
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170716
[St] Status:MEDLINE
[do] DOI:10.1007/s10661-017-6108-y


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[PMID]:28696147
[Au] Autor:Grodeska SM; Jones JL; Arias CR; Walton WC
[Ad] Endereço:1 Auburn University Shellfish Laboratory, School of Fisheries, Aquaculture & Aquatic Sciences, Auburn University, 150 Agassiz Street, Dauphin Island, Alabama 36528; and.
[Ti] Título:Effects of Desiccation Practices of Cultured Atlantic Oysters (Crassostrea virginica) on Vibrio spp. in Portersville Bay, Alabama, USA.
[So] Source:J Food Prot;80(8):1280-1287, 2017 Aug.
[Is] ISSN:1944-9097
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The expansion of off-bottom aquaculture to the Gulf of Mexico has raised public health concerns for human health officials. High temperatures in the Gulf of Mexico are associated with high levels of Vibrio parahaemolyticus and Vibrio vulnificus. Routine desiccation practices associated with off-bottom aquaculture expose oysters to ambient air, allowing Vibrio spp. to proliferate in the closed oyster. Currently, there is limited research on the length of time needed for Vibrio spp. levels in desiccated oysters to return to background levels, defined as the levels found in oysters that remain continually submersed and not exposed to ambient air. This study determined the time needed to return V. parahaemolyticus, V. vulnificus, and Vibrio cholerae levels to background levels in oysters exposed to the following desiccation practices: 3-h freshwater dip followed by 24-h ambient air exposure, 27-h ambient air exposure, and control. All oysters were submerged at least 2 weeks prior to the beginning of each trial, with the control samples remaining submerged for the duration of each trial. Vibrio spp. levels were enumerated from samples collected on days 0, 1, 2, 3, 7, 10, and 14 after resubmersion using a three-tube most-probable-number enrichment followed by BAX PCR. V. cholerae levels were frequently (92%) below the limit of detection at all times, so they were not statistically analyzed. V. parahaemolyticus and V. vulnificus levels in the 27-h ambient air exposure and the 3-h freshwater dip followed by 24-h ambient air exposure samples were significantly elevated compared with background samples. In most cases, the Vibrio spp. levels in oysters in both desiccation treatments remained elevated compared with background levels until 2 or 3 days post-resubmersion. However, there was one trial in which the Vibrio spp. levels did not return to background levels until day 7. The results of this study provide scientific support that oyster farmers should be required to implement a minimum 7-day resubmersion regimen. This length of time allowed the Vibrio spp. levels to become not significantly different across all treatments.
[Mh] Termos MeSH primário: Crassostrea/microbiologia
Dessecação
Contaminação de Alimentos/prevenção & controle
Vibrio parahaemolyticus/crescimento & desenvolvimento
Vibrio vulnificus/crescimento & desenvolvimento
[Mh] Termos MeSH secundário: Alabama
Animais
Baías
Contagem de Colônia Microbiana
Contaminação de Alimentos/análise
Seres Humanos
Ostreidae
Frutos do Mar/microbiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171016
[Lr] Data última revisão:
171016
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170712
[St] Status:MEDLINE
[do] DOI:10.4315/0362-028X.JFP-16-297



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